This Yealink W73H DECT Handset offers stylish appearance and intuitive UI. Clear and stable voice communication experience. Optimized response speed and battery life. Seamless compatible with Microsoft SIP Gateway. Compatible with DECT bases of single cells (W60B/W70B) as well as multi-cell (W80B/W90B). 1.8 inch colour screen, notification light: voice mail and missed call, hard keypad with backlight. HD voice with Opus audio codec; full-duplex speakerphone; FNR (Flexible Noise Reduction)/noise cancellation; hearing aid compatibility (HAC) compliant. Features include up to 2 simultaneous calls per handset and 3-way conference. With a headset jack (3.5mm), Battery: 1010p mAh, Lithium-ion, provides up to 35 hours of talk time, up to 400 hours of standby time.