Relay Module RS232 DB9 Remote Switch

1 Simple operation, most serial commands are single-byte commands. 2 With capacitor filter circuit, which has improved stability. 3 Onboard 2 relay, which can be accessed extended 2-way relay module. 4 Two-channel relay, plus two expansion IO ports, low-level output. 5 Built to meet standard specification, strictly follow factory quality control.

What's in the box
1 x Relay Module