Frequently Asked Questions

QYSEA is an AI solution provider committed to delivering exceptional expertise in the R&D, manufacturing, and sales of underwater ROV, hardware and software solutions. As a company, QYSEA has broken numerous industrial barriers to establish a leading market position with their ROV technologies, proudly garnering recognition for their innovative products and designs.

QYSEA Technology is the leading high-tech enterprise dedicated to developing underwater robotic solutions. FIFISH is the flagship brand under QYSEA, representing the world-class series of professional-grade underwater ROVs (Remotely Operated Vehicles).

FIFISH ROVs are renowned for their patented 360° omni-directional mobility, professional-grade imaging (up to 4K UHD), self-delveloped AI techs and a vast ecosystem of modular tools. Whether for professional cinematography, industrial inspection, or ocean exploration, FIFISH provides unmatched stability, intelligence, and ease of use.

QYSEA has earned numerous international accolades that recognize its excellence in industrial design and technological innovation. Key honors include:

Design Excellence: Recipient of the iF Design Award and the Red Dot Design Award, two of the most prestigious recognitions in the global design industry.

Innovation Awards: Honored with the CES Innovation Award at the Consumer Electronics Show for pioneering underwater robotic technology.

Industry Recognition: Recognized as a National High-Tech Enterprise and listed among the "Top 50 Most Innovative Companies" in the specialized robotics sector.

Global Impact: FIFISH ROVs have been featured by major media outlets and utilized by world-renowned organizations, including National Geographic and Discovery Channel, for professional underwater documentation.

Yes, QYSEA offers an extensive lineup of ROVs beyond the V-EVO, V6 EXPERT, and E-GO, ranging from entry-grade models to high-end industrial systems.

The current product family also includes:

FIFISH E-MASTER: An industrial-grade platform with 200m diving capacity optimized for long-duration infrastructure audits and complex subsea tasks.

FIFISH W6 NAVI: An industrial-class ROV featuring a 350m depth rating and dual 4K cameras, designed for heavy-duty search and rescue and high-stakes operations.

FIFISH X1: A specialized system designed for high-efficiency underwater inspections and monitoring in challenging aquatic environments, offering tailored customization for depths of 350 to 500 meters.

In addition to standard models, QYSEA provides customized ROV solutions tailored to specific industry needs. Contact QYSEA team to build a solution that fits your unique mission requirements.

Yes, QYSEA actively expands its global distribution network through partnership and dealership opportunities. Interested parties are encouraged to contact the team at info@qysea.com or partner@qysea.com, or leave a message to discuss collaboration and join the international network.

QYSEA utilizes advanced AI and vision-based algorithms to enhance ROV intelligence and operational efficiency. The core AI suite includes:

Imaging & Tracking: AI Image Enhancement for color restoration and de-hazing; AI Vision Lock and AI Diver Tracking for autonomous subject following.

Navigation & Stability: Station Hovering for precision hovering in currents; AI Collision Avoidance for real-time obstacle detection; and Q-Pilot for AI-assisted flight control.

Specialized Tools: QY-MT for millimeter-level non-destructive measurements; QY-BT for intelligent 2D/3D seafloor mapping and bathymetry.

For detailed software licensing or model compatibility, please contact us.

QYSEA FIFISH ROVs support a wide range of underwater tasks, from visual observation, light inspection, and content capture to measurement, recovery, sampling, professional inspection, and repeatable navigation-based missions. The right model depends on task intensity, environment complexity, required workflow, and how much precision or repeatability your project demands.

QYSEA FIFISH lineup is designed for different levels of underwater users and workflows. V-EVO is best suited to users who value easy operation, visual observation, and light inspection. V6 EXPERT is for teams moving into measurement, recovery, and basic utility work. The E-GO Series is built for more professional inspection, longer and more organized field workflows.

Yes. We offer customization services for select ROV models to meet specific project or industrial requirements. For inquiries regarding custom features or specialized solutions, please contact our customer service team or email us at info@qysea.com.

Most users can learn basic operation within 30 minutes. Full functions can be mastered with 1–2 practice sessions. If you already have experience flying aerial drones, you will find it even easier and faster to get started with the FIFISH ROVs.

To control and manage your FIFISH ROV, you must use the FIFISH App. You can download the app through the following official methods:

1. App Stores: Search for "FIFISH" in the Apple App Store or Google Play Store.

2. Official Website: Visit the QYSEA official website or QYSEA official online store to access direct download links.

3. QR Code: Scan the QR code provided in your User Manual or official Tutorial Videos.

It depends on your controller configuration:

Standard Remote Controller: Requires a smartphone or tablet to be connected via Wi-Fi pr cable to the controller to serve as the display and interface for the FIFISH App.

Q-iRC (Industrial Remote Controller): This controller features an integrated high-brightness screen and built-in control system, eliminating the need for an external mobile device.

Permission depends on the battery's Watt-hour (Wh) capacity. Below is the status for common models based on standard 100Wh carry-on limits:

FIFISH V-EVO (97.2 Wh): Typically permitted in carry-on luggage.

FIFISH E-GO (69.12 Wh per unit): Typically permitted in carry-on luggage.

FIFISH V6 EXPERT (156 Wh): Exceeds the standard 100Wh limit; may require special airline approval or face transport restrictions.

Other Models: Please check the Wh rating printed on the ROV shell for compliance.

Important: Policies vary by carrier and region. We strongly recommend confirming with your airline before travel to ensure compliance with their specific safety regulations.

For models with integrated batteries (e.g., V-EVO, V6 EXPERT), the shell is factory-sealed to ensure waterproofing; self-replacement is not recommended and will void the warranty. For modular industrial models (e.g., E-GO), the battery is swappable.

Operating temperature limits vary by model and specific hardware configurations.

For FIFISH V-EVO, V6 EXPERT, & E-GO: The supported operating temperature range is typically -10°C to 60°C (14°F to 140°F).

Other Models: Please refer to the specific Technical Specifications in the product manual for the precise temperature range.

Operational Note: While the ROV can function within these limits, extreme temperatures may still affect battery efficiency, sensor precision (drift), or system cooling. Always prioritize the parameters listed in your model's specific user manual for safe and optimal performance.

The FIFISH's patented motor arrangement delivers the user complete 360° freedom to move in all directions and angles underwater (Omnidirectional Movement).

Delivering '6 Degrees of Freedom, the FIFISH can move left & right, up & down, forward & backward, as well as rotate in 360° pitches (y-axis), 360° rolls (x-axis), and 360° yaws (z-axis).

In addition, the FIFISH's Posture Lock™ function enables operators to maintain the ROV's angle position, while moving forwards or backwards simultaneously.

The left joystick controls horizontal movements (i.e., forward, reverse, left turn & right turn)

The right joystick controls rolling movements (i.e. pitch & roll sideways with 360°)

The wheels on the corner of the RC controls lateral & vertical movements (i.e. elevate up/ down, lateral left/ right)

Standard latency is between 150ms and 200ms. If you experience significant lag:

Stay within 5 meters (16 ft) of the Remote Controller.

Lower the Live Resolution to 480P and set the Live Bitrate to 1M in the App settings.

Check for local Wi-Fi interference if operating indoors or near heavy industrial equipment.

This typically indicates the need for a compass calibration. Navigate to the App's calibration menu and follow the instructions for Mag Calibration to re-sync the ROV’s internal sensors with the digital display.

Disconnect power immediately. Use fresh water to flush out sand or salt crystals. For tangled debris (like seaweed or fishing line), carefully use tweezers to clear the propeller. Do not force the motor to spin manually while powered.

The ROV will cease movement commands. Depending on the model and settings, it may initiate a safety protocol or enter a neutral buoyancy state. To prevent loss, always ensure the tether is securely locked and free from sharp obstacles during operation.

Proper post-dive care is essential for longevity:

Rinse: Thoroughly soak and rinse the ROV in fresh water for at least 30 minutes to remove salt and debris.

Dry: Wipe the unit with a soft cloth and allow it to air dry in a shaded area (avoid direct sunlight).

Inspect: Check thrusters for obstructions and ensure connectors are clean and dry before storage.

FIFISH ROVs can charge to 90% capacity within 1 hour at the quickest.

It is recommended to charge and discharge the FIFISH ROV once every 3 months (charge to 50~60% capacity for lengthy storage).

There are two primary methods:

Wireless: Download media directly to your mobile device via the FIFISH App’s "Album" section while connected to the ROV.

Wired: Connect the ROV or Internal SD card to your computer using the official data cable to transfer high-resolution files directly.

Like all storage devices, a portion of the internal memory is reserved for the ROV’s operating system and system logs to ensure stable performance.

A is Attitude mode, S is Sport mode, and C is the Combination mode.

A Mode / Attitude Mode
A Mode is designed for beginners. The ROV will not roll in A Mode. The ROV will stay in same depth moving when depth holding is ON. Even with pitch angle, the depth will be the same.

S Mode / Sport Mode
S Mode is designed for skillful pilots. S Mode will enable the rolling freedom, so you will access all 6 degree of freedom of V6 Expert. Controlling and moving based on the FPV (Frist Person View), do not operate in third person view. The ROV will only stay in the same depth with no command input, when depth holding ON.

C Mode / Combination Mode
C Mode activates the head tracking controlling via the VR Goggle, which allow pilot to use the VR Goggle to pitch, roll and yaw. C Mode delivers the intuitive control and immersive experiences. C Mode supports head tracking and remote controller working together.

Accessories Attached
The right wheel will ONLY be working in A Mode or C Mode for motor driven accessories. For example, robotic arm, water sampler, robotic fish clamp, and compass ruler, and sludge sampler etc.

Our online store currently supports direct shipping to the United States and Canada. More supported countries are coming.

For countries or regions not listed above, please contact our customer service team or email us at shop@qysea.com for purchasing options.

Yes, QYSEA offers specialized pricing for bulk and volume orders. To receive a formal quotation, please submit an inquiry through the website or contact the sales team directly at info@qysea.com. For a faster response, include the following details in the message: specific model(s) of interest, quantity required, and destination country for shipping.

Products are 100% genuine across all official channels. The model and core functions are the same, while minor differences may exist due to production batches. Warranty terms and after-sales services follow the policy of the channel from which you purchased.

A 100% full refund is available for all products and packages, provided the cancellation request is received before the order has been processed and shipped from the facility.

Return and refund requests must be submitted within 14 days of the product delivery date.

To be eligible for a full refund, items must be returned in unused condition, in the original packaging, and include all original manuals and accessories. All returns require pre-approval and a Return Material Approval (RMA) number from the support team prior to shipping.

Customers are responsible for the safe packaging and shipping of the item to the designated QYSEA return address. All return shipping costs, customs duties, and clearance fees are the sole responsibility of the customer.

Once the returned item is received and formally inspected, please allow 7–10 business days for the refund to be approved and credited back to the original payment method.

The warranty begins on the date of product delivery. If the invoice or proof of purchase is unavailable, the warranty period commences 45 days after the product's manufacturing date.

Coverage lengths vary by component category:

12 Months: ROV Camera, Circuit Board, Sensors, LED, Remote Controller (excluding bracket), and Adapters.

6 Months: ROV Battery (or under 200 charge cycles), Motors, and HDMI Kit.

Not Covered: Tether and connectors, Buoyancy Module, RC bracket, Propellers, Spool, and Travel Case.

Any defects or shipping damages must be reported within seven (7) days of delivery. Products must be inspected immediately upon receipt. If no report is filed within this 7-day window, the product is deemed intact and fully functional upon arrival.

The warranty does not apply to damages resulting from non-manufacturing factors, including:

1. Crashes, pilot errors, or fire damage.
2. Unauthorized modifications, disassembly, or opening of the shell (which voids the warranty).
3. Water damage to the remote controller, spool, or HDMI Box.
4. Operation in severe water conditions (strong currents/waves) or high electromagnetic interference.
5. Use of unauthorized third-party parts.

For technical troubleshooting or to initiate a formal repair, contact the dedicated support team at support@qysea.com.

All data on the SD card must be backed up prior to shipping. QYSEA is not responsible for any data loss occurring during the repair process.

Yes, QYSEA operates a global network of authorized service centers to provide localized maintenance and repair support. A comprehensive list of service locations and authorized partners can be found on the official Repair Center Page. For specific guidance regarding a regional repair, please contact support@qysea.com.

QYSEA provides after-sales support worldwide. If your FIFISH ROV encounters any issues, you can reach us through the following channels:

For online:
- Email: support@qysea.com
- Website: after sales
- FIFISH App: Community > My > After-sales Service

For offline:
- Authorized repair centers