Main Blade Digital Pitch Gauge with LCD Display for RC Airplane Helicopter

This is the second one bought. Found on setting up heli blades better to use two. Makes setup faster.

Meh, it's kind of noisy and flickers around a bit, even when I have it still.A bit of noise in the sensors I guess.

The Pitch gauge works, but it would be nice if it came with instructions of some kind. I got it and had no clue what size batteries it took. After searching online I found it required 2 CR2032 batteries. Then with the poor image on the back of the gauge I did not understand which direction to put the batteries in, + down or + up??? Didn't want to put them in backwards and damage the gauge. I figured it out that the + side of the batteries faces up at the removable cover side. The - side down into the gauge. Hope this helps someone having the same question.