Beafon S20. Display diagonal: 41.9 mm (1.65 "), Display resolution: 128 x 64 pixels, Display number of colours: Monochrome. Data network: GSM, GSM bands supported: 900, 1800 MHz. Ringer type: polyphonic. Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 1000 mAh, Talk time (GSM): 4 h. Weight: 85 g, Width: 50.5 mm, Depth: 16 mm