Safety Intelligentheated vest designed with the latest carbon fiber and imported high-quality TPU heating sheet for quick heat up. If up, it would stop running until the heat returns to the standard operating temperature. Help to promote blood circulation and relieves muscle pain in winter, ideal for people who always suffer from bone pain on cold or rainy days Heated Coats with 3 Temperature ControlFast heating within 1-3 seconds, 5 Heating pads will warm you up to 60-65/149 across core body areas (left waist, right waist, left flank, right flank, and mid-back) to make you feel warm in 360. 3 Available settings can be adjusted temperature levels by the button LED lights, red- (60-65/149), white (50-55/131), blue- (40-45/113) Free Size Unisex StyleFreedom of waist-size, adjustable as needed, a simple electrically heated jacket suitable for men and women, which is great for all kinds of winter sports or outdoor activities, like hunting, hiking, skiing , cycling, fishing, office Compatible USB PoweredUSB plug is compatible with most power banks in the market with output of 5V/2.1A, which enables quick smooth electric warmth without radiation, no harm to the human body. A 10000mAH fully charged power supply can keep heating for up to 12 hours and minimum 6 hours (BATTERY NOT INCLUDED) Skin-Friendly LightweightThis Heating Vest made of lightweight Carbon fibre, windproof and waterproof, support hand/ machine/ dry wash. Comfortable and smooth to touch, warmth to last all winter without the bulk of heavy coat.