Features 1. The Smart Hand Warmer Bracelet is designed with soft silicone and plastic, soft and comfortable, and this material will make you feel more comfortable when heated. 2. The temperature is displayed directly and can be seen at any time; Visual intelligent touch screen, (40, 45, 50) three gear temperature adjustable. 3. Large battery capacity of 2000mah, Charging 3 hours and can be used for 300 minutes. Free your hands to warm your hands and play with your phone, safety explosion-proof. 4. Instantly warm up in 3 seconds. Constant temperature heating, just right, to ensure that daily life needs to keep warm at all times. 5. Lightweight and compact, easy to carry, no hand-held design required. The USB charging design also makes it easier to charge. Specification Material: Silicone, Plastic Color: White, Black Package Size: 30 18 6 cm Weight: 120 g Battery capacity: 2000 mAH Charging time: 3 hours Using time: 300 minutes Input Voltage: DC5V/1A Package Include: 1 Hand Warmer Bracelet 1 USB Charger