USB Electric Heating Vest Men Women Winter Smart Heating Inner Soft Heating Vest Thermal Underwear 3 Levels Adjustment *1. Temperature and Timing: Temperature between 113 and 140F, H: (red) about 140, M: (blue)about 131F, L: (green) about 113F. It can heat 6-10 hours. *2. Heating Zone: Using 3 built-in battery heating plates, ultra-thin and efficient heating elements (heating area: back and abdomen) ensure smooth, comfortable and fast warmth both indoors and outdoors. (Battery not included). *3. High-quality Material: It is made of super soft cotton and polyester material, comfortable to fit, especially suitable for effective warmth under the clothes. Suitable for both men and women. *4. Warm and Slim: Special Slim-Fit design for unisex, fit perfectly for better warming your abdomen & waist area, please follow the size chart carefully for choosing the right size. *5. Wide Application: The rechargeable heated vest will provide you with plenty of warmth, running in cold weather, hiking, cycling, motorcycles, outdoor activities, etc. The perfect gift for family, friends and relatives. 1. 3 adjustable temperature levels, heating up to 6-10 hours. 2. The temperature can reach 25-45 degrees Celsius. 3. 3 heating areas, 2 heating areas on the abdomen and 1 heating area on the back. 4. Universal USB interface, use 5V/2A mobile power supply (not included). 5. Machine washable and water washable, good elasticity, not easy to wrinkle. Specification: Name: Smart Electric Heating Vest Material: nylon + polyester fiber (polyester) + fiber heating wire Size: see size chart Packing List:1 * Heating Vest(not include power bank ) Reminder: 1. All pictures have been professionally color-calibrated, but due to the different ambient light and different display device settings, there may be some deviations between the pictures and the objects you see. Please understand. 2. The data is manually measured, there may be some deviations, but it does not affect the use.