The Broadcast Tools Alert Sentinel 2 is a two station stereo analog relay/switcher designed to allow the insertion of alert audio into broadcast program signal paths following in the footsteps of the Broadcast Tools STA-III WX. Perfect for remote weather alerts, remote broadcasts, or live sports. It features a POTS telephone hybrid interface and a balanced analog input compatible with a studio console or 2-way/HAM radio as well as an internal 32GB SD-based MP3/WAV audio player for playing pre-recorded messages. Control with DTMF commands via its POTS telephone interface, 2-way/HAM radio audio input, USB serial commands, or TCP/UDP Ethernet commands.