Viking Electronics 40TB IP VoIP Ceiling Speaker with Talkback MIDI High retention RCA plugs Road Safety High retention RCA plugs 1" Aluminum Tantalum Dome Tweeter <13 Watts) Use with an optional BTR 3 wireless remote to activate calls or adjust speaker volume Paging prioritization Plays audio from multicast SIP endpoint or multicast group member Supports up to 10 multicast paging groups Add an optional SL 2 blue red or amber strobe light (see DOD 242) Blue call status LED indicator SIP compliant (see product manual for list of compatible IP PBX phone systems) Automatic Noise Canceling (ANC) feature for operation in noisy environments Viking’s proprietary VOX switching eliminates the need for “Push to Talk” mode Selectable auto answer feature for monitoring Autoprovisioning via Viking programming software Built in high efficiency 6 watt class D amplifier Relay for activating door locks