1. Introduction
This manual provides essential information for the proper use and maintenance of your Sixmou i3 4K Thumb Action Camera. Please read it thoroughly before operating the device to ensure optimal performance and longevity. The Sixmou i3 is a compact, lightweight action camera designed for hands-free POV recording, suitable for various activities including cycling, motorcycling, vlogging, and underwater adventures.
2. Package Contents
Verify that all items listed below are included in your package. If any items are missing or damaged, please contact customer support.
- I3 Thumb Camera X1
- Magnet Pendant X1
- Spring Back Clip X1
- Waterproof Case X1
- Camera Frame X1
- Thumb Screw X1
- Bike H Mount X1
- USB Cable X1
- Helmet Mount A X1
- M Mount X1
- Turn 90° Mount X1
- Helmet Mount B X1
- User Manual X1
- F Mount X1
- Back Clip X1

Image: The 'What's in the Box' graphic displays the i3 Thumb Camera, Magnet Pendant, Spring Back Clip, Waterproof Case, Camera Frame, Thumb Screw, Bike H Mount, USB Cable, Helmet Mount A, M Mount, Turn 90° Mount, Helmet Mount B, User Manual, F Mount, and Back Clip.
3. Product Overview
3.1 Camera Components

Image: The main product image shows the compact black i3 camera alongside its magnetic lanyard, waterproof case, camera frame, and spring clip.
The Sixmou i3 camera features a minimalist design with key components for easy operation:
- Lens: Front-facing lens for capturing video and photos.
- Power/Record Button: Main button for powering on/off and initiating/stopping recording.
- Indicator Light: Provides status information (e.g., power, recording, charging).
- USB-C Port: For charging and data transfer.
- MicroSD Card Slot: For inserting the memory card.
3.2 Dimensions and Weight
The i3 camera is designed for portability and discreet use.
- Weight: Approximately 1.25 ounces (35.7 grams).
- Dimensions: Approximately 2.5 inches (6.3 cm) in length, 1.1 inches (2.8 cm) in width, and 0.7 inches (1.8 cm) in thickness.

Image: The camera is shown next to a human thumb, illustrating its compact 'thumb size' and its light weight of 1.25 oz (35.7g).

Image: A diagram showing the camera's dimensions: 2.5 inches (6.3 cm) long, 1.1 inches (2.8 cm) wide, and 0.7 inches (1.8 cm) thick.
4. Setup
4.1 Charging the Battery
Before first use, fully charge the camera battery.
- Connect the provided USB-C cable to the camera's USB-C port.
- Connect the other end of the USB-C cable to a USB power adapter (not included) or a computer's USB port.
- The indicator light will show charging status (e.g., solid red while charging, off when fully charged).
- A full charge typically takes approximately 2 hours.
4.2 Inserting the MicroSD Card
A MicroSD card (up to 128GB, Class 10 or higher recommended) is required for recording. Ensure the card is formatted before first use.
- Locate the MicroSD card slot on the side of the camera.
- Gently insert the MicroSD card with the contacts facing down until it clicks into place.
- To remove, gently push the card in again until it clicks out.
4.3 Mounting Options
The Sixmou i3 offers versatile mounting solutions for various scenarios.
- Magnetic Pendant: Wear around your neck for chest-level POV recording. The camera attaches magnetically to the pendant.
- Spring Back Clip: Attach the camera to clothing, bags, or other surfaces using the 360° rotating spring clip.
- Waterproof Case: Enclose the camera in the waterproof case for underwater activities. The case can then be mounted using standard action camera accessories.
- Bike/Helmet Mounts: Utilize the included mounts to secure the camera to bicycles, motorcycles, helmets, or other gear.

Image: A collage demonstrating different ways to mount the camera, including wearing it with a magnetic lanyard, clipping it to clothing, attaching it to a bike, and using it with the waterproof case for diving.
5. Operating Instructions
5.1 Power On/Off
- Power On: Press and hold the Power/Record button for approximately 3 seconds until the indicator light illuminates.
- Power Off: Press and hold the Power/Record button for approximately 3 seconds until the indicator light turns off.
5.2 Recording Video
Once powered on, the camera is typically in video recording standby mode.
- Start Recording: Briefly press the Power/Record button. The indicator light will flash to indicate recording is in progress.
- Stop Recording: Briefly press the Power/Record button again. The indicator light will stop flashing and return to a steady state, indicating standby mode.
5.3 Wi-Fi and App Control
The camera supports Wi-Fi connectivity for control and playback via a mobile application.
- Download the official Sixmou app from your device's app store.
- Power on the camera.
- Enable Wi-Fi on your smartphone and connect to the camera's Wi-Fi network (SSID and password typically found in the camera settings or manual).
- Open the app to view live footage, control recording, adjust settings, and playback recorded content.

Image: A person holding the i3 camera in one hand and a smartphone displaying the camera's app interface in the other, with a scenic lake background, illustrating Wi-Fi app control for playback and sharing.
5.4 Waterproof Case Usage
The included waterproof case allows the camera to be used underwater.
- Ensure the camera is securely placed inside the waterproof case and the latch is firmly closed before submerging.
- The case provides water resistance up to 131 feet (40 meters).
- Always check the case for any damage or debris on the seal before each use.
- The camera itself is not waterproof without the housing.

Image: A split image showing divers underwater with the camera in its waterproof case, and a person surfing, highlighting the camera's 131-foot waterproof capability when used with the case.
5.5 Battery Life and Charging
The camera is equipped with an 800mAh lithium-ion battery.
- 1080P Recording: Up to 150 minutes.
- 2K Recording: Up to 120 minutes.
- 4K Recording: Up to 90 minutes.
- The camera supports recording while charging, allowing for extended recording sessions when connected to a power source.

Image: A graphic illustrating the battery life: 150 minutes at 1080P, 120 minutes at 2K, and 90 minutes at 4K, with an icon showing the USB-C port and the camera's ability to record while charging.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the camera body. For the lens, use a specialized lens cleaning cloth and solution. Avoid harsh chemicals.
- Storage: Store the camera in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For long-term storage, charge the battery to about 50% every few months to maintain its health.
- Waterproof Case: After using the waterproof case in saltwater, rinse it with fresh water and allow it to air dry. Inspect the O-ring seal regularly for wear or damage.
7. Troubleshooting
If you encounter issues with your Sixmou i3 camera, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Camera does not power on. | Low battery; faulty battery; camera malfunction. | Charge the camera fully. If issue persists, contact support. |
| Cannot record video. | No MicroSD card; MicroSD card full or corrupted; low battery. | Insert a MicroSD card. Format or replace the card. Charge the camera. |
| Wi-Fi connection issues. | Incorrect Wi-Fi password; camera Wi-Fi not enabled; app issues. | Ensure correct password. Restart camera and phone. Reinstall app. |
| Poor video quality. | Dirty lens; incorrect resolution settings; low light conditions. | Clean the lens. Check camera settings for desired resolution. Ensure adequate lighting. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand Name | Sixmou |
| Item Weight | 1.26 ounces (35.7 grams) |
| Package Dimensions | 7.64 x 4.96 x 2.24 inches |
| Item Model Number | i3 |
| Batteries | 1 Lithium Ion battery (included) |
| Color Name | Black |
| Special Features | Wireless, audio recording, compact, mobile-app control |
| Photo Sensor Technology | CMOS |
| Video Capture Resolution | 4K |
| Maximum Focal Length | 1 |
| Maximum Aperture | 2.8 f |
| Flash Memory Type | Micro SD |
| Video Capture Format | MP4 |
| Supported Audio Format | AAC |
| Connectivity Technology | Wi-Fi |
9. Warranty and Support
For warranty information, please refer to the documentation included with your purchase or contact Sixmou customer support. Sixmou is committed to providing quality products and support.
For further assistance, technical support, or inquiries, please visit the official Sixmou Store on Amazon or contact their customer service channels.





