Item Type: Rechargeable hand warmer Material: ABS, aluminum Battery: 1200mAh Li ion battery(built in)12 in 1 Function: Electric hand warmer is able to be both warm hands and power bank, which is very convenient and suitable for work, study or travel. 2Lightweight And Portable Design: Hand warmer power bank is small and light enough to be used in your hand without taking up too much space. 3Double Sided Heating: Hand heater power bank adopts double sided heating design, which can quickly heat up in 3 seconds and reach peak range in 50 seconds. 43 Levels Temperature:Rechargeable hand warmer has 3 levels temperature adjustment, from 40 to 60, which can be adjusted to suit your own temperature. 5Lanyard Design:Capsule mini cute hand warmer has a lanyard design that fits directly into your pocket for warmth when you feel cold in winter. 1 xRechargeableHandWarmer 1 x Charging Cable