The Yealink W79P SIP phone system is a wireless business phone system that is well suited for small and medium-sized businesses. It is powerful and can be used with up to ten W59R handsets. Set consists of W59R handset and W70B base station, the DECT radio coverage is up to 50 m indoors and 300 m outdoors, excellent HD audio quality, up to 10 SIP accounts and 20 simultaneous calls (2 calls per handset) can be supported, With built-in Bluetooth and vibration alert.