Sonim ATEX XP3.1 Z2. Display diagonal: 45 mm (1.77 "), Display resolution: 128 x 160 pixels, Display number of colours: 0.065000 M. Data network: GSM, GPRS, GSM bands supported: 900, 1800, 1900 MHz. Bluetooth version: 1.2, Bluetooth profiles: DUN, HFP, HSP, OPP, SPP. Headphone connectivity: 2.5 mm. Ringer type: polyphonic