Feature:1. Under the AT command mode (M0 Connect), a simple AT command can be input to control the relay through the serial port super terminal (serial port assistant).2. Under M0 Disconnect mode, serial port hyper terminal control (need to manually add CRC), Poll software control (software automatically adds CRC), PLC or MCU process control and be applied.3. The maximum delay under AT command is 9999 seconds, and under another command it is 255 seconds.4. Enables flexible application in smart home, home automation, and so on, which adds more convenience to your daily life.5. With a small size and a light weight, the installation is very simple, so are the carrying and storage.Specification:Item Type: Control ModuleWorking Voltage: DC 6-24V (12V version)Working Current: 8-13MATwo 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 (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. Package List:1 x Control ModuleNote:This product has no pins.