1)wifi, bluetooth,thermal printer 2)RS232,optional 1D scaner, rfid,camera,gprs 3)4000battery SPECShandheld pda ... 802.11b/g1 USB 1.1 Host,1 Client 1 RS232 serial portbuilt-in mic; Speaker and 3.5 mm stereo headphone ... printerSuport GSM/GPRS/3G ,WIFI,Bluetooth RS232 communication, and optional buit-in barcode scaner , rfid card reader and 37.9Khz infrared module