One charging dock that can be used with the N-switch dock's original stand. ABCD has four charging slots that can charge one to four handles at once. The product has a USB 2.0 male plug interface and is compatible with the original N-Switch Dock stand for power input. Extended female USB 2.0 socket with communication support and DC 5V power output. Simple, small, and easy to use, this controller shows the charging status in real time.