1、USB INTELLIGENT CONTROL SWITCH: MOS tube control board with power indicator, suction status indicator, USB smart control switch and high performance microcontroller chip on board. 2、CH340G CHIP: MOS tube control module adopts CH340G chip USB TTL solution, which is compatible with for Windows and for Android system, satisfy your various needs. 3、1 CHANNEL POWER SWITCH: Control 1 way power switch through USB serial command, can control DC 5‑24V 5A, support continuous output or automatic power off after 1‑255 seconds of output. 4、PLC PNP INPUT: USB relay module board can be connected to PLC PNP input, and the module can actively notify the computer when the input signal changes. 5、SINGLE BYTE COMMAND: Most of the serial commands are single byte commands. 1 channel relay output, 1 channel isolated input, and the input can match 5‑24V level.