... : 128 MB RAM/1 GB Flash,Expansion Memory:4G TF (standard), maximum 32GInterfaces: USB 2.0, RS232Physical characteristicsScreen ... 4,000 mAh) Expansion slots: SIM/SAM/Micro SD (TF) card, Indicator: LED, Audio: 0.5 watt,Input ... Usb cable, RS232 serial cable, Touch stylus, 4G microSD (TF) card, Hand strap, Carrying case, AC adapter, SDKOptional ... warehouse management handheld Wifi IEEE802.11 b/g RFID Reader