The Yealink W78P SIP wireless phone system is ideal for small and medium-sized businesses. The powerful business system supports up to ten W78H handsets. Set consists of W78H handset and W70B base station DECT radio coverage up to 50 m indoors and 300 m outdoors Energy-saving ECO function Flexible headset connectivity via Bluetooth or 3.5 mm jack Excellent HD audio quality Supports up to 10 SIP accounts and 20 simultaneous calls (2 calls per handset) Fast charging and vibration alert