Magnetic Induction Charging: Portable magnetic USB watch charger compatible with all watch series 44mm, 42mm, 40mm, 38mm, 7, 6 SE, 5, 4, 3, 2, 1. Fast Charging: Your watch can be fully charged in 2 hours. Charges as fast as the original magnetic charger. Small and Portable: The charger features a small body and cable design for easy carrying. NOTE: Our watch chargers do not have a built-in power adapter. CABLE-FREE CHARGING: No need to carry a charging cable when traveling, just plug it into a power bank/computer/USB socket/. Wall charger or other USB chargers, charging continues and the watch never turns off. Multiple Protection: Built-in output short circuit protection, over-voltage and over-charge protection, providing a safe environment for your watch and charger.