Videx 2 Button 3000 Series Audiophone with Electronic Call Tone with Mute Switch

The 3112 audiophone incorporates a 3 level electronic call tone input, lock release button and spare service button. It also includes a mute switch for the electronic call tone input. 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, spare service button and mute switch (for call tone input only). - 3 level electronic call tone input. - Manufactured from impact resistant ABS plastic.