1、Under the AT command mode (M0 Connect), you can input a simple AT command to control the relay through the serial port super terminal (serial port assistant). 2、Under mode (M0 Disconnect), you can control it through serial port hyper terminal control (need to manually add CRC), Poll software control (software automatically adds CRC), PLC or MCU process control. 3、The maximum delay under AT command is 9999 seconds, and the maximum delay under command is 255 seconds. 4、Allows for flexible application in smart home, home automation, and so on, which adds more convenience to your daily life. 5、Equipped with 8 output control pins with 2.54mm pins, this small and lightweight control module is very simple to install. Item Type: Control Module Working Current: 8-13MA Two Command Control Methods: AT command and 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 (2.54mm pin, Approx. 2.54mm / 0.1in). Number of Output Control Pins: 8, with 2.54mm pin (Approx. 2.54mm / 0.1in), 5V TTL level, low level (default)/high level output. 1 x Control Module