Features: 1.2 in 1: The hand warmer 4000mAh combines an extra large capacity electronic hand warmer. 2.Protection Function: With the USB hand warmer's built in overheat and overcharge protection sensors, you can charge your device or enjoy the warmth safely. 3.Rechargeable: The rechargeable hand warmer comes with an indicator light display that lets you know the selected heat setting and the amount of battery left. Avoid getting burned. 4.Small and Portable: Electric hands heater is pocket sized, comfortable and compact for hand holding and comes with a small night light function for a stylish look. 5.Perfect Gift: Multifunctional hand warmer comes with an exquisite gift box, making it a warm gift for friends and family. specification:Item Type: Rechargeable Hand Warmer Material: ABS Function: Night Light, Hand Warmer Number of Gears: 2 Gear Adjustment 45 60 Charging Input: Micro USB Battery: 4000mAh (Included) Type: Lithium Battery Use Time: 3-6 Hours PackageList: 1 xRechargeableHandWarmer 1 x Charging Cord