NGM-Mobile Boris. Display diagonal: 50.8 mm (2 "), Display resolution: 128 x 64 pixels, Display: LCD. Data network: GSM, GSM bands supported: 900, 1800 MHz. Ringer type: monophonic, Audio formats supported: MIDI. Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 1000 mAh, Talk time (GSM): 2.8 h. Weight: 80 g, Width: 50 mm, Depth: 110 mm