Introduction
This manual provides essential information for the safe and effective use of your UNIHAND AI Hand Warmers. Please read these instructions thoroughly before operating the device and retain for future reference.
Product Overview
The UNIHAND AI Hand Warmers are a set of two rechargeable electric heating devices designed to provide warmth in cold conditions. They feature an intelligent AI temperature control chip for precise heat management and extended battery life.

Figure 1: Two UNIHAND AI Hand Warmers.
2-in-1 Design
The hand warmers can be used individually or combined into a single palm-sized unit for 360-degree warmth. This portable design is suitable for various activities such as travel, hunting, golf, hiking, camping, and skiing.

Figure 2: The 2-in-1 design allows for combined or separate use.
AI Temperature Sensor Chip
Integrated intelligent AI temperature control chips provide three levels of precise heat release. The chip continuously analyzes and recognizes the temperature between the hand warmer and your hands, ensuring optimal comfort and safe heating up to a maximum of 130°F (54°C).

Figure 3: Internal view of the AI Smart Chip for temperature control.
Setup
Charging the Hand Warmers
Before first use, fully charge both hand warmers. The device includes a Type-C charging cable designed to charge both units simultaneously from a single power source.
- Connect the dual Type-C ends of the charging cable to the charging ports on each hand warmer.
- Connect the USB-A end of the cable to a compatible USB power adapter (not included).
- During charging, blue indicator lights will illuminate to show the charging status.
- A full charge typically takes approximately 4 hours.

Figure 4: Charging the UNIHAND AI Hand Warmers with the included dual Type-C cable.
Operating Instructions
Power On/Off and Heat Level Adjustment
The hand warmers feature a single button for control.
- To Turn On/Off: Long press the orange button for approximately 3 seconds. Red indicator lights will illuminate when the device is on.
- To Adjust Heat Levels: Short press the orange button while the device is on to cycle through the three heat settings.
- To Check Battery Life: Double press the orange button. Blue indicator lights will show the remaining battery power.

Figure 5: Easy-to-use single button control for UNIHAND AI Hand Warmers.
Temperature Settings and Battery Life
The hand warmers offer three distinct temperature levels, indicated by red lights, and varying battery durations:
- Level 1 (Low): 95-107.5°F (35-42°C) - Up to 20 hours of warmth. (One red light)
- Level 2 (Medium): 104-118.5°F (40-48°C) - Up to 14 hours of warmth. (Two red lights)
- Level 3 (High): 118.5-130°F (48-54°C) - Up to 8.5 hours of warmth. (Three red lights)
Battery status is indicated by blue lights:
- One blue light: Less than 35% battery remaining.
- Two blue lights: 35-70% battery remaining.
- Three blue lights: 70-100% battery remaining.

Figure 6: Indicator lights for temperature and battery status.
Maintenance
To ensure the longevity and optimal performance of your UNIHAND AI Hand Warmers, follow these maintenance guidelines:
- Cleaning: Wipe the surface of the hand warmers with a soft, dry cloth. Do not use abrasive cleaners or immerse the devices in water.
- Storage: Store the hand warmers in a cool, dry place when not in use. Avoid extreme temperatures and direct sunlight.
- Battery Care: For prolonged storage, ensure the devices are partially charged (around 50%) to maintain battery health. Recharge them periodically if stored for extended periods.
Troubleshooting
If you encounter any issues with your UNIHAND AI Hand Warmers, consider the following common solutions:
- Device Not Turning On: Ensure the hand warmers are fully charged. Connect them to the charging cable and check if the blue indicator lights appear.
- Insufficient Heat: Verify that the device is set to the desired heat level (one, two, or three red lights). Allow a few moments for the device to reach its full temperature.
- Charging Issues: Check the charging cable and adapter for any damage. Try using a different USB power source. Ensure the Type-C connectors are fully inserted into the hand warmers.
If problems persist, please refer to the warranty and support section for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | UNIHAND |
| Model Name | AOY-766 |
| Color | Black |
| Material | Aluminum |
| Size | Small (Item Package Dimensions: 5.2 x 3.98 x 0.98 inches) |
| Weight | 0.2 Kilograms (Package Weight) |
| Battery Description | Lithium-Ion |
| Battery Capacity | 6000 Milliamp Hours (Total, 3000 mAh per warmer) |
| Charging Time | 4 Hours |
| Lower Temperature Rating | 95 Degrees Fahrenheit (35°C) |
| Upper Temperature Rating | 130 Degrees Fahrenheit (54°C) |
| Reusability | Rechargeable |
| Power Source | Battery Powered |
| Included Components | Hand Warmers Rechargeable x2 |
| UPC | 753775977908 |
Warranty and Support
Your UNIHAND AI Hand Warmers come with a 2-year warranty. For warranty claims, technical support, or any product-related inquiries, please contact UNIHAND customer service through the retailer where the product was purchased or visit the official UNIHAND website for contact information.

Figure 7: UNIHAND warranty information.