CyberPower ENVIROSENSOR Environmental Sensor, 12V, RJ45 Ethernet Port, 10FT Cable RMCARD/ENVIROMENTAL SENSOR COMPATIBILITY: Combine the ENVIROSENSOR with the RMCARD205/RMCARD305 (sold separately) for real-time temperature and humidity readings of a datacenter, IT closet or other critical environment INPUT CONTACT CLOSURES: Allows users to monitor up to 4 connected devices such as door alarms, security switches and security systems SECURITY MONITORING: Input contact closures provide options for monitoring door alarms, security switches, and other security devices CONNECTION PORT & CABLE: RJ45 Ethernet port with 10FT cable