Screen : Large screen 5 line x 29 character display Lines : 1 Networking : Voice Codecs : G711 Quality Of Service : Network Protocols : TDM Features : 12 label-less call appearances/feature buttons in 2 pages. Large Message Waiting indicator. 4 softkeys. Hearing aid compatible Power Supply : Dimensions : 20.3 x 20.3 x 11.4 cm Weight : 1.1 Kg