This usually means the device is too close to a surface (under 2 feet) or the signal is being absorbed by a soft surface (like curtains). Try measuring against a solid, flat wall.
The device will automatically multiply the two and display the total Area. Calculating Volume (Cu. Ft / m³) Press the button. Point-N-Measure Digital Tape W5746 User Manual
This is a sign of a low battery. Replace the 9V battery immediately for the most accurate results. Safety Warning This usually means the device is too close
Use the memory buttons to add multiple measurements together. This is helpful for measuring a perimeter or a series of windows. Point-N-Measure Digital Tape W5746 User Manual