Sennheiser CC 510 Mono WirelessHeadset (005357)

The CC 510 is an extremely robust monaural headset. It provides excellent sound and is very comfortable to wear. Its durable construction makes it perfect for any type of office or professional communication. 

Sennheiser CC 510 Headset - Mono - Wired - 300 Ohm - 300 Hz - 3.40 kHz - Over-the-head - Monaural - Semi-open - 3.3 ft Cable - Noise Cancelling Microphone