* 8 phone number memory
* 20 seconds of high-quality voice message recording
* Not affected by power cuts
* Plastic base and screws
* 4x3 keypad with buzzer sound warning
* Isolated from PTT line with opto couplers
* Smooth operation on the worst networks
* Easily Programmable
* Lightning filtered
* Works smoothly in all PTT exchanges with Tone (DTMF) and Pulse options
* Compatible with all alarm panels.