The USB port will give you convenient charging, easy to plug in mobile power, PC, laptop or other devices with USB ports, etc.
Magnetic Charging Dock: It holds your i-Watch securely with a strong magnet.The watch charger for Apple buit-in magnetic attraction to the technology. The magnetic attraction automatically absorbs the Apple Watch and then enters the inductive charging.
Fast Charge: less than 2.5 hours for a full charge.
Widely Compatibility: This charging cable supports one Apple Watch Series 4 / 3 / 2 / 1.