Compatiable Headset for Polycom VVX 400 VVX 401 VVX 410 VVX 411 VVX 500 VVX 501 VoiP Light weight, Noise Cancelling mic, Great in any office or home use - EAR308D + QD002P: Amazon.co.uk: Electronics & Photo
Jabra Pro 920 Mono Wireless Headset for the Polycom VVX411