The Apple Watch Series is compatible. All sizes of 38mm, 40mm, 41mm, 44mm, and 45mm are compatible. On-the-go charging and portable, small size. Your watch's wireless charger is small and portable, making it easier to carry around. Port for Lighting. Robust Magnetic Suction: Integrated into the most recent magnetic adsorption module, it charges instantly upon contact. Quick Charger.