Mitel Wireless DECT Headset for Mitel MiVoice 6930, 6940 Phones | This headset is only compatible with 6930 and 6940 Mitel models | Includes Two Bonus Soft Leatherette Cushions: Amazon.co.uk: Electronics & Photo
GN Netcom Headband for GN9330 GN9350 & Mitel 5330 5340 5360 Wireless Headset NEW 706487008415 | eBay
European Mitel Cordless Dect Headset | Sales-Tele UK Telecoms
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Mitel DECT Headset for MiVoice 6900 IP Series | 51305334 | £288.00 | Best4Systems UK