From 1 D tap to 2 USB output.
Built-in identification resistance for APPLE products, it can charge Iphone&Ipad simultaneously, also can be used to charge many other mobile equipment.
Built-in low voltage protection, when the power supplying unit is tested to be under 11V, it won’t provide voltage output.
Built-in 2.5A over current protection.
Low-frequency design of 100Hz can better against interference.