... ,WIFI, GPRS/GSM, Bluetooth interface 4,GPS POS terminal handheld pos terminal/GPS POS terminal with GPRS/GSM/wifi/bluetooth ... prevent accidental data loss and other power5. Extend hardware options: GPS, camera, RFID, etc.6. Built-in one-dimensional ... Security FeaturesStandardBluetooth V2.1+EDRExpansionInternal 3MegaPixel with LED flashExpansionInternal GPS:Channel 48,Accuracy 2.5m,In motion 0.01m/ ...