1、Can input a simple AT command to control the relay through the serial port super terminal (serial port assistant) under the AT command mode (M0 Connect). 2、The maximum delay under command is 255 seconds, and the maximum delay under AT command is 9999 seconds. 3、Enables control through serial port hyper terminal control (need to manually add CRC), Poll software control (software automatically adds CRC), PLC or MCU process control, under M0 Disconnect. 4、You can apply it in smart home, home automation, and so on, to add more convenience and enjoyment to your daily life. 5、Made of premium material, the control module is very durable long-term use, and not easy to break. Item Type: Control Module Working Current: 8-13MA Command Control Methods: AT command. Maximum Delay: 9999 Seconds (under AT demand), 255 Seconds (under demand). Serial Port Super Terminal (serial port assistant): Can input 5 AT commands. Demand: In addition to the serial port hyper terminal input, you can also input commands through "Poll". Input Interface: 6 RS232 (TTL level) input interface (compatible with 2.54mm pin, Approx. 2.54mm / 0.1in). Number of Output Control Pins: 8, compatible with 2.54mm pin (Approx. 2.54mm / 0.1in), 5V TTL level, low level (default)/high level output. 1 x Control Module