Feature:1. Compact And Delicate: USB hand warmer is small and lightweight, therefore it is able to be used in your hand without taking up too much space.2. 3 Seconds Fast Heating: Rechargeable hand warmer can touch the peak range in 50 seconds without waiting for heating for a long time, and has a long service life.3. 3 Levels Temperature: Portable hand warmer has 3 levels temperature , from 35 to 55℃, and you can adjust it to the temperature that suits you.4. Hanging Strap Design: Electric hand warmer has a hanging strap design, which is easy to carry and use, and can also be carried directly in the pocket.5. Multifunctional: Electric hand heater is also able to be used as a nightlight, and it can also illuminate when heating and you will feel warm in cold winter.Specification:Item Type: USB hand warmerMaterial: PCTemperature Adjustment: 3 levels, 35℃ in 1st level, 45℃ in 2nd level and 55℃ in 3rd level.Battery: 1200mAh lithium ion battery( built in)Charging Time: 4-6 hours, no more than 6 hours.Size: Approx. 75 x 85 x 30mm / 3 x 3.3 x 1.2inHow to Use:Lighting:Long press back button to turn on light, and long press button again to turn off light.Heating:Press back button to turn on low temperature mode (35℃).Press again to turn on medium temperature mode (45℃).Press for 3rd time to turn on high temperature mode (55°C).Press 4th time to turn off all functions.Package List:1 xUSB Hand Warmer1 x Charging CableNote:It is forbidden to use it while charging to prevent burns.