This heating glove does not contain battery or power bank. The M size corresponds to the glove with a length of 31.5cm, a width of 11.5cm and a middle finger length of 9.cm. Please choose according to your actual palm size.The XL size corresponds to the glove with a length of 33.5cm, a width of 12.5cm and a middle finger length of 9.5cm. The Heated Skiing Gloves provide a wide heating area covering your whole back of the hand and all fingers in case of poor blood circulation, arthritis, cold weather, or simply for more comfort and warmth. 3M thermal insulation cotton is selected, with a soft texture like velvet. Under the soft and comfortable streamline design, it feels warm and operates freely, getting rid of the shortcomings of traditional gloves, such as heaviness and clumsiness Connect the battery with the connector in the glove, and the switch will flash automatically. Put the battery into the battery bag, zip up, gently press the on key, the first gear temperature is the default, and gently press the on key to continue to adjust the gear. There are three gear temperatures to choose from. Select the gear until the switch light is off The flexible heating fiber is combined with the inside of the glove to form a whole, which has good heating effect, effectively prevents heat loss, transmits more heat to the inside of the glove, and feels comfortable and not stiff Comprehensive waterproof treatment: the glove surface is made of water splash proof fabric, and the surface is waterproof while preventing wind. The glove can be soaked and washed. The zipper is coated with waterproof treatment, which has good waterproof effect, no tearing, good smoothness, flat and delicate surface, and has a smooth feeling similar to leather