: To keep it running, ensure the laser lens is clean of dust using a microfiber cloth and replace the 2 AAA batteries when the low-battery indicator appears.
button to select between distance, area, volume, or Pythagorean (indirect) measurement. : Long-press the button to toggle the beep sound. : Long-press the button, or the device will auto-shutoff after 150 seconds. 2. Maintenance Tips dtape dt50 zero turn user manual pdf