Function: 1. Can input a simple AT command to control the relay via the super terminal (serial port assistant) under 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. Allows control via serial port hyperterminal control (must manually add CRC), Poll software control (software automatically adds CRC), PLC or MCU process control, under M0 Disconnect. 4. You can use it in smart homes, home automation, and more, to add convenience and enjoyment to your daily life. 5. Made of premium materials, the control module is highly durable for long-term use and not easily broken. Specification: Item Type: Control Module Working Voltage: DC 5V (5V version) Working Current: 8-13MA Command Control Methods: AT command. Maximum Delay: 9999 seconds (under AT request), 255 seconds (under request). Serial Port Super Terminal (Serial Port Assistant): Can input 5 AT commands. Request: Besides serial port hyperterminal input, you can also input commands via \"Poll\". Input Interface: 6 RS232 (TTL level) input interfaces (compatible with 2.54mm pins, approx. 2.54mm / 0.1 inch). Number of Output Control Pins: 8, compatible with 2.54mm pins (approx. 2.54mm / 0.1 inch), 5V TTL level, low level (default)/high level output. Package List: 1 x Control Module Note: This product does not include pins.