British Telecom Granite Twin. Volume control: Digital. Phonebook capacity: 100 entries. Display: Inverse. Base dimensions: 135 x 135 x 31 mm, Handset dimensions: 120 x 43 x 15 mm, Handset weight: 76 g. Talk time: 10 h, Standby time: 100 h, Battery technology: Lithium Polymer (LiPo)