Videx 2 Button 3000 Series Audiophone with Electronic Call Tone and AC Buzzer

The 3101 audiophone incorporates a 3 level electronic call tone input, an AC buzzer call input, lock release button and spare service button. For use on traditional 3+1 and 4+1 audio systems including 4K series, 8K series, VR4K series and VR120 series audio kits. - Includes lock release button and spare service button. - 3 level electronic call tone input and AC buzzer input. - Manufactured from impact resistant ABS plastic.