Features: Adjustable Temperature:You can adjust the temperature to suit yourself, making this winter warm and different. Portable Hand Warmer: Cobblestone hand warmer and power bank (when needed) 2-in-1. It can be put it any pockets or bags while you're exercising, fishing, hiking, camping and skiing. Safer To Use: High-tech aircraft grade aluminum, ABS material, polymer batteries. Hand-held Warmth: Double-sided heating and 3 temperature settings: 107F (42C) / 118F (48C) / 131F (55C). Warm your hands in 2 seconds. Easily turn the warmth on and off. Choose from four colors and choose your favorite one. Specifications: Color:Rose Gold,Gold,Blue,Silver,Blackoptional Material:ABS,Aluminum Capacity: 5200mah Input / Output: 5V/2A Charging time: 2-3 H Use time: 6-12 H Temperature: high temperature: 55C, constant temperature: 48C, low temperature: 42C Size:10 x 6 x 3cm / 3.93 x 2.36 x 1.81in Weight:176g / 6.20oz Package List: 1 x Hand Warmer 1 x Velvet bag 1 x Instruction manual 1 x Charging Cable