Multiple Protections: Built-in over-current, over-voltage, short circuit, and over-temperature protection ensures a safe environment for both your Watch and the charger. Cableless Design: No more tangled cables! The wireless design makes it more convenient to carry this Watch charger with you wherever you go. Portable Travel Charger: Take this keychain charger with you wherever you go. Its compact size makes it easy to slide into your pocket or hook onto your bag. Perfect for outdoor activities and travel. Fast Charging Speed: Fully charge your Watch in just 2-3 hours with the original charging speed. Plug the wireless charger into your computer, socket, or power bank to start charging anywhere. Magnetic Induction USB Charging: Charge your Watch immediately after contact with the built-in strong magnetic adsorption module.USB-A charging port compatible with SAMSUNG Galaxy Watch 6 40mm | 44mm,Galaxy Watch 6 Classic 43mm | 47mm,Galaxy Watch 5 Pro 45mm/Galaxy Watch 5 40mm/44mm,Galaxy Watch 4 (40mm 44mm ),Galaxy Watch 4 Classic (42mm,46mm),Galaxy Watch 3 (41mm), Galaxy Watch 3 (45mm),Galaxy Watch Active 1 SM-R500 (40mm),Galaxy Watch Active 2 (40mm),Galaxy Watch Active 2 (44mm).