The Broadcast Tools Site Sentinel® 4 G2 is a robust, full-featured; web-enabled four channel remote control featuring a desktop/mobile browser compatible web interface (HTML5.) The system is equipped with four metering inputs (0 to +10 VDC), four optically-isolated status (logic) inputs, four programmable SPDT relay outputs (ON, OFF and pulsed operation), one external temperature probe input, stereo silence sensor, and power failure input. Includes built-in support for email, and SNMP.