1. Safety Information
Please read all safety instructions carefully before using the coldSky ZY-A1 Rechargeable Magnetic Hand Warmers. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Do not disassemble, repair, or modify the device.
- Keep the device away from water, moisture, and high humidity.
- Avoid exposing the device to direct sunlight, open flames, or extreme temperatures.
- Do not use the device if it is damaged or malfunctioning.
- Use only the provided charging cable.
- Keep out of reach of children and pets.
- Do not puncture, drop, or apply excessive force to the device.
- Dispose of the device and its battery according to local regulations.
2. Package Contents
Verify that all items are present in your package:
- coldSky ZY-A1 Rechargeable Magnetic Hand Warmer (x2)
- Type-C Charging Cable
- User Manual

Image: The coldSky ZY-A1 hand warmers, charging cable, and user manual as included in the package.
3. Product Overview
The coldSky ZY-A1 hand warmers are designed to provide portable and reusable warmth with advanced features.
Key Features:
- 2-in-1 Magnetic Design: Two separate units can be used individually or magnetically attached for combined warmth.
- Instant Heating: Heats up in approximately 3 seconds.
- Three Heat Settings: Adjustable temperature levels for varied comfort needs.
- Portable and Lightweight: Compact size for easy carrying in pockets or gloves.
- Efficient and Long-Lasting Battery: Each unit features a 2000mAh rechargeable battery.
- Pressure Relief Module: A rotating disk on the back of each unit for tactile engagement.

Image: The coldSky ZY-A1 hand warmer, illustrating its compact dimensions (2.3 inches wide, 3.2 inches long) and lightweight design (0.15 lbs each), shown fitting into a pocket and a bag.
4. Setup
Charging the Hand Warmers:
- Connect the provided Type-C charging cable to the charging port on each hand warmer.
- Connect the USB-A end of the cable to a compatible power source (e.g., USB wall adapter, computer USB port, power bank).
- The indicator lights on the hand warmers will illuminate to show charging status.
- A full charge takes approximately 3 hours. The indicator lights will change or turn off when charging is complete.

Image: Two coldSky ZY-A1 hand warmers connected to a single Type-C charging cable, illustrating the charging process.
Video: A demonstration of the coldSky ZY-A1 hand warmers, showcasing their features and operation, including the magnetic design and heating function.
5. Operating Instructions
Power On/Off:
- To power on, press and hold the power button for approximately 3 seconds. The indicator lights will illuminate.
- To power off, press and hold the power button for approximately 3 seconds. The indicator lights will turn off.
Adjusting Heat Settings:
- Once powered on, short press the power button to cycle through the three heat settings.
- Level 1: 104-113°F (indicated by one light)
- Level 2: 113-122°F (indicated by two lights)
- Level 3: 122-131°F (indicated by three lights)

Image: A close-up of the coldSky ZY-A1 hand warmer, showing the three indicator lights corresponding to the three adjustable heat levels.
Magnetic Function:
The two hand warmer units feature a strong magnetic design, allowing them to be easily attached to each other or to compatible metal surfaces. This enables versatile use, either as a single combined unit or as two separate warmers for both hands.

Image: Two coldSky ZY-A1 hand warmers magnetically attracting each other, illustrating their 2-in-1 design.
Pressure Relief Module:
Each hand warmer is equipped with a rotating disk on its back. This module can be spun for tactile feedback, which some users find helpful for stress or anxiety relief.

Image: A hand interacting with the rotating stress relief module on the back of a coldSky ZY-A1 hand warmer, demonstrating its 360-degree rotation.
6. Maintenance
Cleaning:
- Wipe the surface of the hand warmers with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals, as these may damage the device.
Storage:
- Store the hand warmers in a cool, dry place when not in use.
- Avoid storing in direct sunlight or areas with high humidity.
- Ensure the devices are fully charged before long-term storage to maintain battery health.
7. Troubleshooting
If you encounter issues with your coldSky ZY-A1 hand warmers, refer to the following common solutions:
- Device not heating: Ensure the device is powered on by pressing and holding the power button for 3 seconds. Check the battery level; recharge if necessary.
- Device not charging: Verify that the charging cable is securely connected to both the hand warmer and the power source. Try a different USB port or power adapter.
- Short battery life: Battery duration can vary based on the selected heat setting and ambient temperature. Higher heat settings consume more power. Ensure the device is fully charged before use.
- Indicator lights not working: If the device is otherwise functioning, this may indicate a minor issue. If the device is not heating or charging, refer to the above points.
8. Specifications
| Brand | coldSky |
| Model Name | ZY-A1 |
| Battery Capacity | 2000 mAh (per unit, total 4000 mAh) |
| Charging Method | Type-C |
| Input | DC5V/1A |
| Charging Time | Approximately 3 hours |
| Usage Time | 7-12 hours (depending on heat setting) |
| Heat Settings | 3 Levels: 104-113°F, 113-122°F, 122-131°F |
| Material | Plastic |
| Dimensions (each unit) | Approx. 3.2 in (L) x 2.3 in (W) x 0.8 in (H) |
| Weight (each unit) | Approx. 0.15 lbs |
| Certifications | UL, CE, FCC, RoHS |
9. Warranty and Support
Warranty Information:
The coldSky ZY-A1 Rechargeable Magnetic Hand Warmers come with a 1-year limited warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper storage.
Customer Support:
For technical assistance, warranty claims, or any questions regarding your coldSky ZY-A1 hand warmers, please contact our customer support team. Refer to the contact information provided on the product packaging or our official website.