British Telecom Studio 4100. Dialer location: handset. Phonebook capacity: 50 entries. Display: LCD, Display number of colours: Monochrome. Base dimensions: 102 x 121 x 52 mm, Handset dimensions: 51 x 30 x 154 mm, Handset weight: 91 g. Battery type: AAA, Talk time: 10 h, Standby time: 100 h