Yealink YEA-W52P Business IP HD DECT Cordless Phone Exceptional HD sound with wideband technology Up to 4 simultaneous external calls 1.8" color display with intuitive user interface Up to 5 handsets, Up to 5 VoIP accounts Local Phonebook for up to 500 entries (store in the base).Range: 50 meters indoor, 300 meters outdoor DECT/Cat-iq2.0, 1 x RJ45 10/100M Ethernet port, Power over Ethernet (IEEE 802.3af), Headphone jack (2.5 mm) NOT compatible with 8x8 Service