Jabra C510 Earwave handsfree headset 

Features: 

Secure and discreet behind-the-ear design for maximum comfort. 
Designed to complement the contemporary styling of modern mobile phones . 
Boom microphone for optimal voice pick-up. 
Answer / End button on boom tip for ultimate convenience. 
Dedicated Mute button. 
Wind noise reduction microphone 
Built in 2.5mm jack for compatibility with all 2.5mm phones 
Includes 3.5mm adapter for compatibility with all 3.5mm phones 
Headset does not support Nextel push to talk feature