The Grandstream DP750 is a long-range DECT VoIP base station with the capacity to host up to 5 DP720 cordless DECT handsets. DECT is a radio technology used for voice data devices such as cordless phones. The DP750/DP720 set features up to 10 SIP accounts, with up to 10 lines per handset and up to 5 concurrent calls, along with 3-way audio conferencing. The DECT base station features integrated PoE, while the DP720 handsets includes HD audio, with G722 and Opus support, along with full duplex speakerphones, and a 3.5mm headset jack. The DP750/DP720 claims a range of 50 meters indoors, and 300 meters outdoors.