DC 12V 2 Channel RS232 Relay Module Board Remote Control USB PC UART COM Serial Ports for Smart Home

Features: ? Channel: 2-channel relay;there are 2 expansion IN ports, low level output? Interface:DB9 female RS232 level,can control relay on/off/self-lock/inching by computer terminal Operating Voltage:DC 12V (range:8.5-13.5V) Control Voltage:DC 9V 12V or DC 8.5-13.5V/AC 85-265V Control Current:10A ? Package Included: ? 1 x? 2 Channel? RS232 Relay