Product features and specifications: The use of sensitive sensors ensures accurate measurement. Interchangeable mouthpieces - additional 4 pieces! LCD display without backlight Range 0.00 - 1.99 ppm (with measurement accuracy 0.01%). Audible alarm when a certain limit is exceeded (eg warning 0.2 ppm, danger above 0.5 ppm). Automatic shutdown to save energy (10 seconds after measurement). Power supply: 2x AAA battery (not included) Material: plastic Color: black Dimensions: 110mm x 50mm x 23mm How to use: Press and hold the button to turn on the device. The device will count down the 10 seconds it takes to warm up (WARM UP). When the word BLOW appears on the screen within 10 seconds, blow into the sensor (blow for at least 3 seconds). After some time (up to 5 seconds), the test result will appear on the screen. The result is given in g/l and �C (blood alcohol concentration). Convert the result to ppm: This is approximately the value of the above result on the display, e.g. 0.4 g/l = 0.4 ppm. After 10 seconds after taking a measurement, the dredger will automatically shut down to save energy.
