To charge the original watch only from apple, not the cuban watches. Borofone bq13 wireless for apple watch, output 5v / 0.35a. Usb input 5v / 1a. Wireless output 5v / 0.35a. Compatible with apple watch. Material abs + pc. Dimensions 27 * 7 mm. Cable length 1.2 meters. To protect multiple circuits from borofone international Superior safety with a wide range of safety features including temperature control and current regulation to protect connected devices, made of high quality material.