Plantronics M143-N1 Ear-Hook Headset With Built-In Adapter & Answer/End Button.

FEATURES:
-Detachable earhook that wraps comfortably around the ear
-Adjustable noise-cancelling boom microphone for crystal clear calls
-Advanced speaker technology to protect hearing
-Plantronics RF Noise Shield to reduce annoying static
-Microphone adjust switch for optimal voice output
-Compatible with telecoil-equipped hearing aids
-Clothing clip for added stability
-One touch call/answer/end button

Answer/End button works for Nokia phones only.