1、Carbon fiber heating, good insulation, fast heating, washable, high‑quality craftsmanship, double‑layer integrated, easy to wear, no wrinkles. 2、Density plus velvet, windproof and warmth, bright and smooth color, no lint, professional seaming technology, no thread off, firmness. 3、Built‑in heating system adopts the most advanced heating technology, three‑speed intelligent heating, keep warm in cold weather. 4、The outer material is viscose, not easy to snag, not easy to pilling, soft and skin-friendly, high temperature far infrared, skin-friendly, anti-static function, healthy care and comfort. 5、Three levels of temperature adjustment, one‑button control, intelligent automatic constant temperature, obviously improve the human body temperature circulation, enhance human cell activity, promote metabolism, and improve human immune function. 6、8 heating zones and 3 temperature adjustments, 5 carbon fiber heating elements generate heat in the waist, abdomen and upper back. Three heating settings with one button, using intelligent heating system. Condition: 100% brand new Item type: Electric Heating Smart Waistcoat Material: Polyester fiber + polyester Color: black Three gear switching: red light 65 (±5℃), white light 55 (±5℃), blue light 45 (±5℃) High temperature=65(±5℃) Medium temperature=55(±5℃) Low temperature=45(±5℃) Category: Suitable for both men and women Instructions: 1. Remove the USB plug 2. Plug-in mobile charger 3. Open the detachable charger 4. Press and hold the chest temperature control switch for two seconds 5. The red light flashes, indicating automatic heating 6. After the red light flashes for 5 minutes, it will automatically turn to white light, indicating medium temperature 7. There are three levels of manual adjustment, red light means continuous high temperature heating, white light means continuous medium temperature, blue light means continuous low temperature 8. Press and hold the chest temperature control switch for two seconds, turn off the light and stop heating Washing instructions: Take out the power bank, add neutral detergent and wash by hand, do not rub strongly, and ventilate the washed clothes before use. 1 x Electric Heating Smart Waistcoat