USB 8 Channel Relay Module for Computer Control DC5V

1 USB interface fit for Windows,for Linux operating systems.
2 Two kinds of instructions: AT command and 8-byte command, the two commands are automatically recognized, no need to switch.
3 Maximum delay of 9999 seconds under AT command.
4 UART serial port protocol, support two interfaces, USB_B female interface (CH340 serial chip), RS232 interface (TTL level).
5 Open, close, jog, self-lock, interlock, delay, all open, all closed 8 working modes (8-byte command no delay mode).

What's in the box
1 x USB Relay Module