W745 SAVI 3 in 1 with Battery Charger Plantronics Savi W745,UNLIMITED Talk Time,SAVI 3 IN 1, Convertible,UC,DECT 6.0,NA The Savi 700 Series gives the word productivity a whole new meaning This new wireless system lets you move around the office without missing a call from your desk phone, mobile phone or PC With multi-device connectivity, a newly designed lightweight headset, and up to 350 feet of wireless range.