... wifi, bluetooth,thermal printer 2)RS232,optional 1D scaner, rfid,camera,gprs 3)4000battery SPECShandheld pda with thermal printerOSCPU WINCE5. ... (ID) HF:13.56M(ISO14443A) (optional)Symbol Laser Barcode reader(optional)2.0mega pixel( optional)22 Tracking / 66 Acquisition-ChannelDimensions ... ,Bluetooth RS232 communication, and optional buit-in barcode scaner , rfid card reader and 37.9Khz infrared module