Gigaset DX600A ISDN. Phonebook capacity: 750 entries. Display: TFT, Display resolution: 320 x 240 pixels, Display number of colours: 0.065536 M. Weight: 770 g, Dimensions (WxDxH): 263 x 108 x 168 mm. Operating temperature range (T-T): 10 - 35 °C, Operating relative humidity range: 10 - 85 %