1、Support Multiple Devices in Parallel: In the specified command mode, the relay module can support up to 64 devices in parallel. 2、Anti Surge Protection: The module comes with TVS anti surge protection function, which can prevent the transient current caused by excessive current when connecting to the circuit. 3、Configurable Association Mode: The input and output relationship of the relay module can be set to various association modes through instructions according to your needs. 4、Complete Functions: The relay module not only has TVS anti surge function, but also has hardware reset function. 5、Wide Application: Relay modules are widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and are one of the most important control components. Item Type: Relay Module Material: PCB Standby Current: 14MA Single relay on: 40MA, 2 relays on: 68MA, 3 relays on: 96MA, 4 relays open: 122MA, 5 relays open: 149MA, 6 relays open: 177MA, 7 relays open: 202MA, 8 relays open: 226MA Default Baud Rate: 9600BPS Baud Rate Can be Selected by Command: 2400,4800,9600,19200,38400,57600,115200BPS Maximum Data Sending and Returning Time: 1000ms Check Mode: No check, even check and odd check Hardware Reset Function: Yes TVS Anti Surge Protection: Yes 1 x Relay Module