Socket Mobile SoMo 650M. Display diagonal: 88.9 mm (3.5 "), Display resolution: 240 x 320 pixels, Display: LCD. Internal memory: 0 MB. Processor clock speed: 624 MHz. Interface: USB. Storage temperature range (T-T): -25 - 70 °C, Operating temperature range (T-T): 0 - 50 °C