Flexible VoIP solution for small businesses . Exceptional HD sound with wideband technology . Up to 4 simultaneous external calls . Up to 2 simultaneous calls per handset . Up to 5 DECT cordless handsets . Up to 5 VoIP accounts . 1.8″ color display with intuitive user interface . 5~10 hours talk time, 100 hours standby time . Integrated PoE（Class 1） . Desktop or wall mountable