Features: 1. Quick Heating: Hand warmer double-sided heating, it takes 5 seconds to warm the hands tightly, 3-speedtempreture, the first gear: 40C, the second gear: 50C, the third gear: 50C, click the temperature can be easily changed at the touch of a button. 2. As A Power Bank: The 1800mAh capacity USB rechargeable battery can keep your hands warm for 2-5 hours, and it can also be a power bank, you do not need to be afraid of the power failure of your electronic devices at critical moments. 3. Neck Design: It fits the neck like a hot towel, which makes the whole body warm and even the tense muscles become relaxed. The pocket-sized hand warmer is small and exquisite and can be used with one hand. Take it, or put it in a travel bag or pocket. 4. Double Safe Protection: Overheat protection mechanism, built-in smart chip, warm and worry-free, safe to use, keep warm and safer. 5. Multipurpose: Suitable for outdoor, winter sports, skiing, at home, gift giving, travel, work, hunting, sports, fishing, hiking, camping, and cycling. Specification: Material: ABS Product Color: Pink, Green Product Size: 15.5 x 8.8 x 3.8cm Product Weight: 170g Instructions for Use: 1. The Hand Warmer Function: Short press the switch to turn it on, the default is 1st gear, and the temperature starts to rise. The neck warmer position reaches 48C, and the hand warmer position reaches 40C to stop. 2. The Neck Warmer Function: The neck warmer is fixed at 48C, and the neck warmer parts can be controlled separately. Double-click the button switch, the temperature "88" is displayed as power on, and "00" is displayed as off. 3. Power Bank Function: Insert the USB data cable, automatically start the power output quickly to charge external devices. 4. Attention: 1. Press and hold the button to turn on the power, and the power on is 1st gear 40C. 2. Click the gears to switch the 1st gear at 40C, the 2nd gear at 50C, and the 3rd gear at 60C in this cycle. 3. Can't work while charging. 4. Each gear will work for 20 minutes without changing gears, and it will automatically shut down. Package Included: 1 x Multifunctional Mini Hand Warmer