Upow S1 Wireless Charging Pad for iPhone X, iPhone 8/8 Plus, Samsung S7/S7 Edge All Qi-Enabled Devices Wireless Charging: Starts the moment you place down any Qi-enabled device or device equipped with a Qi-compatible receiver. No cables or USB interface required Smart IC: high efficiency energy management system design maximizes the output as required and minimizes energy consumption when idle with LEDs charging status display Ultra Compact: Only 0.27in thin, coffee cup coaster size (3.4  3.4  0.27in), 1.76oz, delivers a modern, premium appearance, making it simple and fashion. Anti-Slip Design: anti-slip silicon circle on both sides of the pad, keeping securely your phone in place and preventing the charger itself from slipping and being knocked out. For stable charging, 1.5A input current is required. 1.5 amp or higher current(like 2A) AC adapter(Not included)is recommended, Protective cases is suggested to be removed during charging