Feature:1. Quickly charge the hand warmer and travel with full power anytime and anywhere, perfect for outdoor sports, fishing, hiking, camping, skiing, traveling.2. Multifuction, dualuse for hand warmer and mobile power bank, great gift for girls, kids, youth, boys mens, women, elder.3. With power on, short circuit and over loading intelligent protection system, you can use with confidence4. There is a lanyard which can be hung on the hand and can be carried with you.5. This hand warmer heating on both sides, the right temperature bring you warmness in cold winter.6. It's light and compact, very easy to hold and it can be put into your pocket.Specification:Condition: 100% Brand NewItem Type: Hand WarmerMaterial: ABS+AluminumColor: As shown in the pictureSize: Approx.8.3x6.8cm/3.3x2.7in(H x W)Built-In Battery: Lithium ion battery,4000mAhGear: Three gears, red for 55-60, purple for 47-52, blue for 35-45Instructions:The product has only 1 button, short press it to turn on, then press to adjust the gear, and then turn off after the third gear..Package List:1 x Hand Warmer with Lanyard1 x USB cableNote:1. Please allow 12cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Due to the transportation time, when the product arrives in your hand, it may be out of power, please charge it before use.