... service)12. LED Advertising Screen, RS232 Printer, Temperature sensor, RFID (optional) Positioning and tracking: through the ... Current 16mAworking Current:60~150mACurrent of opening infrared of Camera at night :100~200mACharging current: Max<500mABatteryLithium ... antenna ,GSM antenna, Engine controller, SOS button, Microphone, Camera, LED advertising display(optional) Application Area :Taxi companies, ...