Features 8 Channel Relay Board: Control up to 8 external outputs, allowing efficient management of switches and sensors, enhancing operational flexibility. Internal Circuit Protection: Provides built-in protection, ensu the safety and reliability of the relay control module du operation. Precise Wi for Stable Performance: Delivers precise wi for stable and dependable performance, ensu practical and easy operation. 6 Instructions for Versatile Control: Offers 6 instructions including open, close, momentary, self-locking, interlock, and delay, providing versatile control options. Sturdy ABS Shell: The Stable ABS shell ensures longevity and robustness, offe peace of mind for extended usage. Specification: Item Type: Relay Module Material: ABS Working Voltage: DC 12V Communication Interface: RS485 interface, net work interface (optional) Features: 1. 6 Instructions: open, close, momentary, self locking, interlock, delay 2. Under the Delay commands, the maximum delay is 255 seconds 3. Can be entered through the serial port hyperterminal (serial port assistant) 4. Can support up to 64 devices in parallel 5. The default baud rate is 9600BPS, the baud rate can be set by commands: 1200 2400 4800 9600 19200BPS 6. Data sending and returning time can be set, the maximum value is 1000ms Package List: 1 x Relay Module Note: Pay attention to the correct operation. Package List 1 x Relay Module