The CA2000 alcohol tester analyses the concentration of alcohol in the breath, displaying it in mg/ml (promille). The CA2000 detects the alcohol with a special alcohol sensor. After 300-400 tests the device must be sent back for calibration. The scope of the device is 0,0 - 4,0 promille, the device releases a signal when 0,5 or more promille is reached. The results are shown in two decimals. CA2000 is 99,9% reliable and CE and DOT certified. 50 mouth pieces are included.