You do not worry about the problem of safety because the watch charge features over-current, overload, over-voltage and short-circuit protection.The multifunctional and practical watch charger also allows for data transmission. You will have stable and quick charging experience due to the copper core.Made of TPE material, the watch charger is durable and environmental-friendly to use.The size of the watch charger cable can be chosen from 30cm and 100cm.The watch charger is suitable for Fitbit Versa3 and for Fitbit Sense.Item Name: Watch ChargerMaterial: TPEInput voltage: 5VOutput voltage: 5VOutput current: 1000mAInterface: Probe InterfaceCompatible Model: for Fitbit Versa3/Sense SmartwatchFeatures: Safe, Quick Transmission, Long Service TimeSize Details: Watch Charger Cable Length: 30cm/11.81", 100cm/39.37" (Approx.)Notes:Due to the light and the screen setting difference, the item's color may slightly differs from the pictures.Please allow slight dimension difference due to the manual measurement.Package Includes:1 x Watch Charger(Watch Not Included)