LotFancy QD Quick Headset Disconnect cable Plus (+) Headset Headphones for Nortel Networks NT Northern Telecom Meridian PBX: M3903, M2008; Meridian Norstar: M7208, M7310, T7208; ACDI Ip Telephone LotFancy T400 Polaris Monaural Over-The-Head Quality Headset Quick Headset Disconnect cable Soft leatherette ear cushions for all day comfort About 10-feet cord with RJ-9 modular plug lets you walk away from the phone while still wearing your headset Polaris models are for phone systems with built-in amplifiers Package Include: 1 x Calltel Headset with Quick Headset Disconnect cable and 1 x User manual