Yealink W77P

Up to 20 simultaneous external calls, Expandable up to 10 DECT cordless handsets (support W73H/W59R/W53H/W56H/W57R handsets & DD Phone), Up to 10 VoIP accounts, PoE Class 1, Yealink W57R handset (1.8'' 128 x 160 TFT color screen, Up to 40 hours talk time, Up to 575 hours standby time)