... bluetooth,thermal printer 2)RS232,optional 1D scaner, rfid,camera,gprs 3)4000battery SPECShandheld pda with thermal printerOSCPU WINCE5.0,MOBILE6 ... or WCDMA (optional)supportPower BatteryCharging methodCharging time Rechargeable 3.7V,4000mAH battery Enclosed power supply,separate seat charge5hours ... RS232 communication, and optional buit-in barcode scaner , rfid card reader and 37.9Khz infrared module