Plantronics Vista M22 Amplifier 43596-64 049797913254 The heavy duty option provides

The heavy duty option provides positive shifts without loss of driver comfort for improved performance

Inside Diameter: 4-1/2

The front wheel is shaped in a round analog clock display with roman numbers that makes it a perfect fit for traditionalDecor as well

Make any space work for you

Plantronics Vista M22 Amplifier 43596-64 049797913254 The heavy duty option providesFor_Use_With VoIP and PBX Phone Systems Accessory_Type Audio Processor Pre consumer_Recycled_Content_Percent 0% Post consumer_Recycled_Content_Percent 0% Adds value to standard and wideband VoIP as well as PBX phone systems. Clearline audio technology improves call quality, enhances speech clarity, reduces background noise and equalizes volume. Quick Disconnect feature lets user walk away from the phone without removing the headset or losing the call.