1)wifi, bluetooth,thermal printer 2)RS232,optional 1D scaner, rfid,camera,gprs 3)4000battery SPECShandheld pda with thermal ... jack; MP3 stereo900/1800/1900MHz,CDMA-EVDO or WCDMA (optional)supportPower BatteryCharging methodCharging time Rechargeable 3.7V, ... m drop onto concreteGPRS/3G pos printerSuport GSM/GPRS/3G ,WIFI,Bluetooth RS232 communication, and optional buit-in barcode scaner , rfid ...