Spectra Precision CR600 Rod/Machine Receiver with C50 Rod Clamp and Mag Mount - Transit and Level
Elikliv Laser Detector for Green Beam Laser Level, Digital Laser Receiver Used with Pulsing Line Lasers Up to 200ft, Detect Green Laser Beams, Three-Sided LED Displays - - Amazon.com
Spectra LR30W Wireless Machine Control Laser Detector w/ Wireless RD20 Remote Display - JC Smith Inc
Spectra Precision LR20-1 Laser Receiver with Plumb Indicator | Superior Instrument