Battery: 5000mahBattery working time: 4-8 hoursVoltage: 5VMaterial: PolyesterOne size design: suitable for sizes 36 to 44, with elasticity and elasticityCharacteristic1. Third level temperature setting: high: 65 (5-6 hours), medium: 55 (6-7 hours), low: 45 (8-9 hours). Washable heated socks can keep your feet warm all day.2. 5V 5000mAh rechargeable lithium-ion battery: The APP heating socks include a pair of 5V 5000MAH rechargeable lithium-ion polymer batteries. After being fully charged, the battery can last for approximately 4 hours in the highest temperature mode and 8 hours in the lowest temperature mode.3. Heating element and USB charging: The heating element is concentrated on the feet, which helps to concentrate heat on the toes and prevent the feet from getting cold.4. APP control: Heating socks is controlled through the APP, allowing for adjustment of external temperature without lifting the pants legs. Humanized design, easy to use5. Widely used: Washable battery heating socks made of polyester. And it adopts a water absorbing, breathable, fast drying, and elastic thickened electric module, which is very suitable for driving, cycling, hunting, skiing, ice fishing, hiking, and sports events.