[juanbenae]

Have known a couple people who've had those over the years. Expensive unit, monthly subscription charges, and then it has to be recalibrated a few times a year. Don't know if it's in real time, or they can download data at the recalibration appointments, but the one I know of most recently would tattle on you if you blew in it and failed due to consumption of booze.

Good tool in keeping the rest of us a bit safer on the road. If I were in that situation, and thankfully I'm not I'd prefer that over the ankle monitor that can read blood alcohol and snitch you out to your PO.