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Spectra Precision HR220 Laser ReceiverProduct Review
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Allows work indoors or outdoors to 250-feet
Works in all horizontal and vertical applications, magnetically attaches on ceilings or metal studs, and includes a heavy duty rod clamp
Front LCD and simultaneous rear corner LEDs (red above, green on-grade, and blue below)
Auto shut off feature 30 minutes after last laser strike or button press
50-hour battery life