The Motion Pro gauge has two nifty auto features as well. An adjustable auto-off feature to shut down the gauge when it doesn’t detect any pressure. This extends the life of its two AAA batteries a bit longer. Also, an auto-on function can use a small amount of battery power to continually monitor chuck pressure and turn on the gauge when it detects some. This is handy at the track, where frequent pressure checks are common. Hectic paddock or serene garage, a billet chuck and aluminum body with a rubber boot should stand up to regular use.