... 4G TF (standard), maximum 32GInterfaces: USB 2.0, RS232Physical characteristicsScreen: 3.2" QVGA backlight TFT-LCD, 65 K colors ... Development Kits (SDK) providedRFID (LF)Operating frequency: 125KHz, 134.2KHz Protocol: ISO11784, ISO11785 Duplex Mode: FDX-B, HDX ... Carrying case, AC adapter, SDKOptional Accessories 1. Bluetooth Thermal Printer 2. Cradle (Docking station) Product Certificates:CE, CCC, SGS, ...