NGM-Mobile Premier. Display diagonal: 45 mm (1.77 "), Display resolution: 128 x 160 pixels, Display: TFT. Compatible memory cards: microSD, Maximum memory card size: 2 GB. Data network: GPRS, GSM, GSM bands (primary SIM): 900, 1800 MHz, GSM bands (secondary SIM): 900, 1800 MHz. Ringer type: MP3, Audio formats supported: MP3. Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 900 mAh, Talk time (GSM): 5 h