1. Introduction
Thank you for purchasing the Yixinxin 4K 64MP Underwater Digital Camera, Model DC020DY. This manual provides essential information for setting up, operating, and maintaining your camera. Please read it thoroughly before use to ensure optimal performance and longevity of your device.
This camera is designed for capturing high-quality photos and videos in various environments, including underwater, thanks to its 4K video resolution, 64MP image capability, and waterproof design.
2. Package Contents
Verify that all items listed below are included in your package:
- Yixinxin DC020DY Digital Camera
- Pouch
- 32GB Micro SD Card
- 1250mAh Lithium-Ion Battery
- Type-C USB Cable
- Wrist Rope
- User Manual (this document)

3. Product Overview
3.1 Key Features
- 4K Video Recording: Capture high-definition videos at 2160p resolution.
- 64MP Still Images: Take crisp and detailed photos.
- Autofocus Function: Ensures sharp images by automatically adjusting focus.
- Dual-Screen Design: Features a 1.8-inch front screen for selfies and a 2.8-inch rear screen for general viewing.
- 16FT (5m) Waterproof: Designed for underwater use without an additional housing for up to 1 hour per session.
- 16x Digital Zoom: Magnify your subjects for closer shots.
- Anti-Shake Function: Helps stabilize images and videos.
- 1250mAh Battery: Provides approximately 70 minutes of continuous video recording.


4. Setup
4.1 Charging the Battery
- Open the battery compartment cover.
- Insert the 1250mAh Lithium-Ion battery, ensuring correct orientation. The compartment is sealed for waterproofing.
- Close the battery compartment cover securely until it clicks.
- Connect the camera to a power source using the provided Type-C USB cable. The charging indicator light will illuminate.
- Once fully charged, the indicator light will change or turn off. Disconnect the cable.
Note: Incorrect battery orientation will prevent operation and may damage the camera.

4.2 Inserting the Micro SD Card
- Ensure the camera is powered off.
- Open the battery/card compartment cover.
- Insert the 32GB Micro SD card (or another compatible card up to 128GB) into the card slot with the contacts facing the correct direction. Push until it clicks into place.
- Close the compartment cover securely.
Important: The camera requires a Micro SD card for storing photos and videos. Format the card in the camera's settings before first use.
5. Operating Instructions
5.1 Powering On/Off
- To power on, press and hold the Power button.
- To power off, press and hold the Power button again.
5.2 Switching Modes (Photo/Video)
- Press the MODE button to switch between Photo mode, Video mode, and Playback mode.
5.3 Taking Photos
- Ensure the camera is in Photo mode.
- Frame your shot using the rear or front screen.
- For autofocus, gently press the Shutter button halfway down. The focus frame on the screen will change from yellow to green when focus is achieved.
- Press the Shutter button fully to take the photo.


5.4 Recording Videos
- Switch to Video mode using the MODE button.
- Press the Shutter button to start recording. A red indicator or timer will appear on the screen.
- Press the Shutter button again to stop recording.

5.5 Using Digital Zoom
- In Photo or Video mode, use the T (Telephoto) and W (Wide-angle) buttons to adjust the 16x digital zoom.

5.6 Selfie Mode (Dual Screen)
- When taking a photo or video, the front 1.8-inch screen can be used to frame your shot for selfies.
- Ensure you are facing the front of the camera to utilize this feature.

5.7 Playback
- Switch to Playback mode using the MODE button.
- Use the navigation buttons to browse through your photos and videos.
- Press the Shutter button to play videos.
6. Maintenance
6.1 Waterproof Care
- Before each underwater use, ensure the battery and card compartment cover is securely closed and sealed.
- After using the camera in saltwater, rinse it thoroughly with fresh water.
- Wipe the camera dry with a soft cloth before opening any compartments.
- Do not open the battery/card compartment when the camera is wet or submerged.
6.2 Cleaning
- Use a soft, lint-free cloth to clean the camera body and screens.
- For the lens, use a specialized lens cleaning cloth and solution if necessary. Avoid touching the lens with your fingers.
- Do not use harsh chemicals or abrasive cleaners.
6.3 Storage
- Store the camera in a cool, dry place away from direct sunlight and extreme temperatures.
- If storing for an extended period, remove the battery.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Camera does not power on. | Battery is depleted or incorrectly inserted. | Charge the battery. Ensure the battery is inserted with correct polarity. |
| Cannot take photos/record videos. | Micro SD card is full, not inserted, or not formatted. | Insert a Micro SD card. Delete unnecessary files or format the card (backup data first). Ensure sufficient space. |
| Images are blurry. | Autofocus failed, lens is dirty, or camera moved during capture. | Ensure autofocus frame turns green before fully pressing the shutter. Clean the lens. Use anti-shake feature or hold camera steady. |
| Water leakage after underwater use. | Battery/card compartment not properly sealed. | Ensure all compartment covers are securely closed and latched before submerging. Check seals for damage. |
| Camera freezes or becomes unresponsive. | Software glitch or low battery. | Remove and reinsert the battery to reset the camera. Ensure battery is charged. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | DC020DY (Manufacturer Model: UP020BU02) |
| Image Resolution | Up to 64 Megapixels |
| Video Resolution | 4K (2160p) |
| Waterproof Depth | 16 feet (approx. 5 meters) for up to 1 hour |
| Dual Screens | Front: 1.8-inch LCD, Rear: 2.8-inch LCD |
| Digital Zoom | 16x |
| Image Sensor | CMOS (1/2.7-inch) |
| Image Stabilization | Digital |
| File Format | AVI (Video) |
| Storage | Micro SD card, up to 128GB (32GB included) |
| Battery | 1250mAh Lithium-Ion (approx. 70 min video recording) |
| Connectivity | USB Type-C |
| Dimensions | 15.1 x 11.8 x 4.7 cm |
| Weight | 226.8 g |
9. Warranty and Support
For warranty information and technical support, please refer to the contact details provided with your purchase or visit the official Yixinxin website. Keep your proof of purchase for warranty claims.
If you encounter any issues not covered in this manual, please contact customer support for assistance.