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, environmentally friendly polymer batteries. Hand-held Warmth: Double-sided heating and 3 temperature settings: 107°F (42°C) / 118°F (48°C) / 131°F (55°C). 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，Black（optional） Material：ABS，Aluminum Capacity: 5200mah Input / Output: 5V/2A Charging time: 2-3 H Use time: 6-12 H Temperature: high temperature: 55°C, constant temperature: 48°C, low temperature: 42°C Size：10 * 6 * 3cm / 3.93 * 2.36 * 1.81in Weight：176g / 6.20oz Package List： 1 * Hand Warmer 1 * Velvet bag(Random) 1 * Instruction manual 1 * Charging Cable