Sonim XP1300 Core. Display diagonal: 50.8 mm (2 "), Display resolution: 320 x 240 pixels. Compatible memory cards: SD, Maximum memory card size: 16 GB. Data network: EDGE, GSM, GSM bands supported: 850, 900, 1800, 1900 MHz. Bluetooth version: 2.1+EDR, Bluetooth profiles: DUN, HFP, HSP, OPP, PBAP, SPP. Headphone connectivity: 3.5 mm