5V 10000mAh UL battery pack, keep warm for 4-8 hours. 5 high-quality carbon fiber heating elements heat the 4 core parts of the body such as the neck, back, chest, and waist. Three-level temperature adjustment (high/medium/low) one-key adjustment, convenient and intelligent. Detachable and adjustable hooded stand-up collar design provides extra wind protection. The closed zipper pocket ensures that personal items such as mobile phone wallets are not easy to lose. Water resistant nylon fabirc,unrestricted movement and breathability New mylar thermal lining ensures you don't lose any excess heat and enjoy more warmth Applicable scene Heating vest can be used in a cold environment. For example, daily commuting, skiing, hiking, hunting, ice fishing, skiing, mountain climbing, etc. It is an ideal gift for family, friends and employees.