Feature: 1. Adjustable Temperature: Hand warmer has 2 adjustable temperature, low temperature and high temperature, you can do whatever you want to warm winter. 2. LCD Display: Electronic hand warmer adopts LCD display and smart sensor, clear temperature and remaining power, visual temperature, easy to charge in time. 3. Power Bank Function: Mobile phone energy supply station, up to 2A charging and discharging current, fast charging and discharging, making your life more convenient. 4. Comfortable Hand Feel: The paint of the rechargeable hand warmer is comfortable to the touch, and the surface coating is delicately treated to fit the curve of the palm. 5. Portable Design: The USB hand warmer is compact, easy to carry, and portable when you go out. Intimate lanyard design, anti drop. Specification: Item Type: Electronic Hand Warmer Material: ABS, Aluminum Alloy Size: Approx. 7 x 10.3cm/2.8 x 4.1in Battery Type: Lithium Polymer Battery (Included) Battery Model: 18650 Battery Capacity: 6000mAh Charging Time: 4-5 Hours Power: 7-10W Heating Temperature: 40℃ for the First Gear, 50℃ for the Second Gear, 60℃ for the Third Gear (Plus or Minus 3%). Package List: 1 x Electronic Hand Warmer1 x USB Cable1 x Instruction Manual1 x Carrying Strap1 x Storage Bag Note: 1. When charging the hand warmer, the hand warmer function cannot be turned on2. When using the computer USB port to charge, the charging time will be relatively long (10 hours from low power to full power), it is recommended to use a charging adapter whose input parameters can up to DV5V 2A.3. Please allow some errors due to manual measurement.