GEQUDIO Headset for GX3+ GX5+ and Compatible with Mitel, Aastra, Poly/Polycom and Gigaset-RJ Phone - Includes RJ Cable - Headphones & Microphone with Replacement Pad - Lightweight 60g (1-Ear) : Amazon.co.uk: Electronics
Headset for Mitel MiVoice 6920 IP 6930 IP Phones Home Office Call Centre Noise Cancelling Mic Comfortable Headband FREE RJ9 Plantronics QD Lead - EAR510 QD002P Single Ear: Amazon.co.uk: Electronics & Photo