Features： 1、Relieve Physical Discomfort: USB handwarmers help relieve menstruation, Raynaud's disease, joint pain, cracked skin and frostbite. 2、Carry It With You: When your mobile phone is out of power, you can charge it anytime and anywhere and you can enjoy the warmth at work, at home, or shopping. 3、The Gift: Cartoon hand warmer with pocket mini body and cute shape can as a great gift for girls, children, teenagers, boys, men, ladies and the elderly. 4、Suspended Silicone Ring: Portable hand heater is comfortable, non irritating, environmentally friendly wrist sleeve, hanging on bags, cabinets, etc., to meet various needs. 5、Comfortable Heating: Electric hand warmers is made of aluminum alloy + silica gel + electronic components, with smooth touch, keeps your hands warm at all times, creating a warm world for you in winter. Specification： Item Type: Hand Warmers Built In Battery: Lithium Battery 3000mAH Heating Temperature: Low Temperature 45℃, High Temperature 55℃ Charging Time: 2.5 Hours Heating Power: 5W Material: Aluminum Alloy + Silica Gel + Electronic Original Package List： 1 x Hand Warmer 1 x Manual 1 x USB Line 1 x Adapter