... storage battery2.Waterproof: every part of the product owns waterproof function, including power adapter cable, breadboard, battery cell, electric motor, ... will not be damaged.4.Theftproof: it has double theftproof function, with the anti-theft alarm inside, and the safety footing ... also make the products more safety.5.Emergency function: emergency key goes with the products, in case of power off.6 ...