This velvet-hand warmers with efficient graphene carbon fiber heating system heats up in just three seconds. The soft, skin-friendly, durable material covers the largest heating area for the maximum warmth of your hands, knees, legs, or stomach. It is designed for versatile use, as a hand muff, cushion or heating pad. The machine-washable warmer connects to a power bank or an outlet, perfect for outdoor activities. Features 1. Fast Heating System Design: Heats up in three seconds with efficient graphene carbon fiber heating system. The Winter also can be warm. 2. Soft Material: The heated hand warmer is made of high-quality material, super soft, skin-friendly and durable, and create the largest heating area to provide maximum warmth for the front and back of your hands. 3. Versatile Function: The heated hand warmer is designed for versatile use. Button up to work as hand muff to keep your hands warm; Spread out to work as heated cushion or heating pad for knees, legs or stomach etc. to relieve body pains. 4. Machine Washable: Equipped with an extra-long cord that is detachable, the hand warmer can be easily washed as needed. 5. Easy to Use: Connect directly to your power bank(Not Include) or use extended cable to plug with outlet, computer, car charger. You will be able to warm your hand indoor and outdoor activities, like night fishing/night hunting/winter golfing/skiing/camping. Specification Material: Velvet Color: Grey, Yellow, Green, Blue Size: 30 x 50 cm Weight: 200 g Power: 10 W Voltage: 5 V/2A Package Include: 1 Heated Hand Warmer(Not Inlcude Power Bank) 1 Cable Charger 1 Dustproof Bag 1 Manual