Callez 2.5 mm Telephone Headset Dual with Noise Cancelling Microphone, Landline Headphones for Siemens Gigaset C430A S810 Panasonic Grandstream Cisco Linksys SPA Polycom Dect Cordless Phone: Amazon.co.uk: Electronics & Photo
2.5mm Phone Headset with Mic, Professional Noise Cancelling Volume Control Business Headset, for Home Office, Call Center, Telemarketing, Customer Service: Amazon.co.uk: Electronics & Photo
2.5mm Headset Bottom Connection Lead | Headset Store