Telfort 871751. Display diagonal: 45.7 mm (1.8 "), Display resolution: 128 x 160 pixels, Display: TFT. Internal memory: 0.5 MB. Data network: GSM. Ringer type: polyphonic, Audio formats supported: MP3. Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 800 mAh, Battery type: BL-5CB