Fit228, the ignition interlock controller protects prevents a driver from starting a vehice if his/her breath alcohol concentration is above a certain limit. Including thetester handset & car control unit. (a)breath alcohol test handset: 1. Display:: four color oled,96*64dots. 2. Keyboard:5 keys operation, up, down, left, right, ok. 3. Power supply: Built-in rechargeable battery; DC 12v(10-16v) from controller unit 4.: Ir remote (usart,9600bps) or cable wired (rf-45 connector, usart,9600bps) Communication with controller unit 5. Heat warm up:: chamber & sensor warm up automatically 6.: Operation condition -40 degree c to +85 degree c. 7.: PC download for IBM compatible PC (through rs-232 cable,9600bps-optional) 8.: Data log with real time clock (rtc) 9.: Instructing LED for indication 10. Accuracy:: +/-0.01%bac 11.: Suck feature for anti-cheat test (b) car controller box: 1.: Auto ignition control system & vehicle starter control port 2.: Wired or ir communication 3.: Speedometer/engine running detection 4.: Parking light control port 5.: Horn honk control port 6.: Relay: DC 12v/40a for starter control 7.: Power supply: Dc12v (10-16v) from vehicle. 8.: Fcc, ccc s&e, CE, nf&dot approval