The device control the starter and oil pumper based on your fingerprint SPEC: Power Supply DC 9V ~ 12V Power Consumption CMOS Module Max.140mA@12V Chip Sensor Module Max.121mA@12V 4 Output Relays 4 Output Relays, Max. Driving Current: 1A each Environment Temperature CMOS Module(0�Ž ~ 60�Ž) Chip Sensor Module(-40�Ž ~ 85�Ž) Dimension Of DSP Board 121 x 105 x 11mm Cable Length Max. up to 2m for the sensor devices Fingerprint Sensor CMOS Module / Chip Sensor Module Cable Length Max. Up To 2M For The Sensor Devices Users Record Stored 20 Fingers, Can Be Extended Dimension Of DSP Board 121 x 105 x 11mm Users Record Stored 20 fingers FAR 0.001% FAR 0.1% Matching Speed < 2sec for 1-to-N Identification Communication Interface RS232 Processor 400 Mhz DSP