SwissVoice MP-03. Display resolution: 128 x 64 pixels, Display number of colours: Monochrome. Data network: GSM, GSM bands supported: 900, 1800 MHz. Headphone connectivity: 3.5 mm. Ringer type: monophonic. Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 1000 mAh, Battery type: 3.7 V