Features 1.1 minute quick heat, cold and warm.2. Set the temperature you want to respond to various environments.3. One-key heating, three-speed temperature control, intelligent heating.4. Can be machine washed or hand washed. Do not twist by hand.5. Universal USB interface for power supply, longer service life, anti-splashing, washable.6. Fashionable, warm, comfortable and breathable, it is a good partner for you to go out in winter.Specifications: 1.Style:Sleeveless vest2. Material: polyester3. Color: Black4. Size: L5. Power supply: 5V/2A mobile power supply (not included)6. Temperature difference (manual adjustment) 7. Warm color: 56 (red light)8. Comfort: 46 (white light)9. Energy saving: 39 (blue light)Package Contents: 1 * Heated Vest (excluding power bank)