2-in-1 Design: Combines hand warmer and power bank, which can be used as a comfortable hand warmer in cold Winter and a portable phone charger for emergency use. Also features an inbuilt LT and Type-C cable and an extra USB cable for phone charging and self-charging. Designed with double-sided heating and featuring 3 heating levels(113℉/122℉/140℉), our rechargeable hand warmer helps to focus heat within 3S to warm up your hands, feet, knees, waist and back, which suits your warming needs indoors and outdoors. Features one-button control, easy to operate. Long press the power button to adjust the appropriate temperature. The digital display also helps you know about the real-time temperature. Short pressing the power button can get informed of the battery status, which provides much convenience when it needs to be recharged. Inbuilt with an 8000mAh rechargeable battery, our mini hand warmer keeps on standby for 2 hours after charging. USB rechargeable feature allows it to be charged by a power bank, adapter, PC, car charger, etc. An optimal caregiver for you and your mobile devices in cold Winter. Ultra-compact and portable, easy to carry on the go. Thoughtful gift for family, friends, lovers and colleagues.