Sabotheat Heated Gloves are equipped with two rechargerable 7.4V 3000mAh high capacity Li-ion batteries and four heating levels. You can choose different heating level according to ambient temperature and your favour. The highest temperature is 60℃/140℉, which is suitable for cold winter. The gloves can last 7.5 hours at most when at the lowest heating level. The heating elements cover the whole back of the hands and the fingers, which will keep your hands from freezing and good for outdoor activity.