1Hand Warming Function: Powerful, double sided heating, warm your hands and make you feel comfortable. Beautiful and fashionable, with LED color light, make the night atmospheres more romantic. 23 Gears Temperature Are Adjustable: Constant temperature heating, long press the switch button to turn on heating, short press the switch button to switch gears. 3Multifunctional Hand Warmer: USB input and output, it can be used as power bank for mobile phones to meet the needs of multiple scenarios. 4Intelligent LED Digital Display: Battery remaining capacity and temperature display, convenient for temperature adjustment and timely charging. 5Good Plastic Material: Made of high quality plastic material, safe and eco friendly, firm and sturdy, delicate and skin friendly, stable and durable for use. Item Type: Hand Warmer Material: Plastic Battery Capacity: a built in 18650 lithium battery with a capacity of 10000MAH (included) Voltage: 5V Gear Temperature: 60 in the 1st gear, 50 in the 2nd gear, 40 in the 3rd gear Product Size: Approx. 116 x 68 x 38mm / 4.6 x 2.7 x 1.5in Weight: 277g / 9.8oz(approx.) Charging Time: 3-6 Hours 1 x Hand Warmer 1 x USB Cable 1 x Lanyard 1 x Storage Bag 1 x Manual Please allow slight error due to manual measurement. Thanks for your understanding.