1、8 CHANNEL: Independent 8 channel relay module, 8 channel external control output and active low level can control switches or sensors, etc. 2、CIRCUIT PROTECTION: The relay switch supports internal circuit protection, with stable and reliable performance, easy to operate and use, and long service life. 3、6 COMMANDS: Supports 6 commands of On, Off, Instantaneous, Self Locking, Interlock, Delay, under the Delay, the maximum delay is 255 seconds. 4、SETTABLE TIME: The data sending and returning time can be set, and the maximum value is 1000ms, which is suitable for more application situations. 5、GOOD DURABILITY: The low level relay module has a compact structure and uses excellent board elements that are not prone to damage or defects. 1 x Relay Module Item Type: 8 Channel Relay ModuleMaterial: PCBWorking Voltage: DC 12VCommunication Interface: RS485 interface or network interface (optional)6 Commands: On, Off, Instantaneous, Self Locking, Interlock, Delay, under the Delay command, the maximum delay is 255 secondsBaud Rate: 1200 2400 4800 9600 19200BPS, can be set by command, default 9600BPSOther Functions: Data transmission and return time can be set, the maximum value is 1000ms