... wafer-proof capability and1.5 m drop survival to concrete to ensure high performance under various extremely environments Integrated ... Flash,Expansion Memory:4G TF (standard), maximum 32GInterfaces: USB 2.0, RS232Physical characteristicsScreen: 3.2" QVGA backlight ... All alphanumeric keypadStandard Accessories4,000 mAh Li-ion battery, Usb cable, RS232 serial cable, Touch stylus, 4G microSD (TF) card, ...