Wide Compatibility:this keychain charger compatible with Samsung Galaxy Watch Ultra,Galaxy Watch 8,Galaxy Watch 8 Classic,Galaxy Watch 7,Galaxy Watch 6,Galaxy Watch 6 Classic,Galaxy Watch 5 Pro,Galaxy Watch 5,Galaxy Watch 4 Classic,Galaxy Watch 4,Galaxy Watch 3,Galaxy Active,Galaxy Active 2,Galaxy Watch FE 40mm. Dual Input Interfaces:charger with Micro and Type-C input interfaces,can use either input interfaces to charging for smart watch.(Note: only is charger,USB Micro cable and USB Type-C cables are not included). Keychain Charger:this keychain charger compatible with samsung galaxy Watch Ultra/8/7/6/5/4/3,Galaxy watch active 1,Galaxy watch active 2 and Galaxy watch FE 40mm,charging docks with keychain,you can put it in your pocket or travel bag,easy to use and convenient to carry. Safety Charging:this charger with over current,over voltage,short circuit and over heat protection,provide a convenient and safe charging for smart watch. Package List: 1 x Charger. (Note: this product is charger, not is power bank) Charging docks compatible with Samsung Galaxy Watch Ultra,Galaxy Watch 8,Galaxy Watch 8 Classic,Galaxy Watch 7,Galaxy Watch 6/6 Classic,Galaxy Watch 5/5 Pro,Galaxy Watch 4/4 Classic,Galaxy Watch 3,Galaxy Active/Active 2,Galaxy Watch FE 40mm.This charger with strong magnetic design,can easily align smartwatch into the charger and fast charging.