OvisLink Dual Ear Call Center Headset for Mitel Business Phones &#9989; Headset Compatible with Mitel MiVoice IP Phone 5312, 5320, 5320e, 5324, 5330e, 5340e, 5360; MiVoice Digital Phone 4222, 4223, 4224, 4225, 5370, 5380, 8528, 8568; Mitel MiVoice Analog Phone 6730a, 6865i, 6867i, 6869i. AASTRA IP Phone 6730i, 6731i, 6735i, 6737i, 6739i, 6755i, 6757; Zultys IP phone ZIP 59i, ZIP 55i, ZIP 53i &#9989; OvisLink Binaural Noise Cancelling Microphone Headset with RJ9 Headset Adapter (Quick Disconnect Cord). Premium voice quality Call Center Headset for professional usage. Advanced featrues include Acoustic Shock Protection, Noise Canceling and RF-Shield. &#9989; Simple to use, Connect the comes with RJ9 Quick Disconnect Cord to the phones Headset Jack, no need additional adapter. Press headset button on the phones keypad to use the headset. All phone functions control by the phone keypad can also be used for the headset. &#9989; Comfortable to wear All-Days. Over-the-Head Style, Lightweight, Smooth leatherette ear cushion, Tangle-Free headset cord and Two earpieces on both ears help user focus on phone conversation &#9989; Durable for Call Center agents to use for all-days. 2 YEAR WARRANTY AND 30 DAY GUARANTEE  We stand behind the quality of every one of our products which is why were happy to offer you a 2 year warranty and 30 day guarantee on your Ovislink Mitel Phone headset.