Review on Huepar Three Sided Displays with Detector Receiver by Chris Quinto

Used this (attached to standard 4ft level) with a Huepar Box-1G Laser Level (Item B0793M6Z37) and found it to be in full Sun was fully operational 50 feet Me was necessary. Pointing the detector away from the sun increases the range to about 100 feet. It's not something you would use to build a road, but if you're leveling a shipping container or gravel pad for a barn, it will work. Hold it up as you measure, and remember that it takes some time to produce a constant tone that tells you you're at the exact height you want. (Fast or slow beeps instruct you to go up or down.)