Introduction
This manual provides essential information for the safe and effective operation of your YI 4K+ Action Camera. Please read it thoroughly before use and retain it for future reference.

Image: Front view of the YI 4K+ Action Camera, showcasing its lens and sleek design.
Package Contents
Verify that all items are present in your package:
- 1x YI 4K+ Action Camera
- 1x Rechargeable 1400mAh battery
- 1x Waterproof Case
- 1x USB Cable
- 1x User Manual (this document)

Image: The YI 4K+ Action Camera displayed alongside its included waterproof case.
Setup
1. Charging the Battery
- Insert the rechargeable 1400mAh battery into the camera's battery compartment.
- Connect the camera to a power source using the supplied USB Type-C cable.
- The charging indicator light will illuminate. Charging is complete when the light turns off.
2. Inserting a Memory Card
The YI 4K+ Action Camera supports SD cards. Ensure the card is inserted correctly before use.
3. Attaching the Waterproof Case
For underwater use or protection against elements, place the camera inside the waterproof case. Ensure the case is securely latched.

Image: An exploded diagram illustrating the components and assembly of the YI 4K+ waterproof case, highlighting its hermetically sealed design and ultra-white glass.
Operating Instructions
Power On/Off
- To power on: Press and hold the Power button.
- To power off: Press and hold the Power button again.
Recording Video
The camera supports 4K video recording at 60fps. Electronic Image Stabilization (EIS) is available for 4K/30fps.
- Select video mode on the 2.2" retina touch screen.
- Press the Shutter button to start recording.
- Press the Shutter button again to stop recording.
Taking Photos
Capture 12 MP RAW photos with the 155-degree wide-angle f/2.8 high-quality glass lens.
- Select photo mode on the touch screen.
- Press the Shutter button to take a photo.
Voice Command (Firmware Update Required)
Future firmware updates will enable hands-free control using voice commands.
Connectivity
The YI 4K+ features a USB Type-C connector for faster data transfer and external microphone support. Wireless connectivity is also available.
Maintenance
- Keep the lens clean using a soft, lint-free cloth.
- Ensure the waterproof case seals are free from debris before use.
- Store the camera and accessories in a dry, cool place.
- Regularly back up your footage and photos.
Troubleshooting
Camera Not Powering On
- Ensure the battery is fully charged.
- Check that the battery is inserted correctly.
Recording Issues
- Verify that a compatible SD card is inserted and has sufficient free space.
- Format the SD card if errors persist (this will erase all data).
Waterproof Case Leakage
- Inspect the rubber seals for any damage or debris before each use.
- Ensure the latches are securely closed.
Specifications
| Feature | Detail |
|---|---|
| Brand | YI |
| Model Number | YAS.1817 |
| Display Resolution Maximum | 4K |
| Video Capture Resolution | 4K (60fps, 30fps with EIS) |
| Photo Resolution | 12 MP (RAW format support) |
| Lens | 155 Degree wide-angle f/2.8 glass lens |
| Screen Size | 2.2 Inches (Retina Touch Screen) |
| Battery Type | Lithium Ion (1400mAh) |
| Battery Life | Up to 2 hours at 1080/60 fps, over 1 hour at 4K/60fps |
| Supported Media Type | Memory Card (SD) |
| Connectivity | USB Type-C, Wireless |
| Processor | Ambarella H2 SOC, Quad-core Cortex-A53 ARM |
| Image Sensor | IMX377 12MP |
| Video Format | H.264, .mp4 file format |
| Supported Audio Format | mp4 |
| Color | Black |

Image: An internal view of the YI 4K+ Action Camera, illustrating its advanced industrial design and compact component arrangement.
Warranty and Support
For warranty information and technical support, please refer to the official YI Technology website or contact their customer service. Keep your purchase receipt as proof of purchase.
Official YI Technology Website: www.yitechnology.com