Mini Ultrasonic Digital Tape Measure is a perfect tool to quickly know the distance, area and volume of a room! It can measure distances in a straight-line from 0.5m to 18m. Your distance measurer transmits ultrasonic waves to a point you want to measure.
Afterwards, it measures the time taken by the waves to reflect and then calculates and re-transcribes the distance. Description: Material: ABS Color: Yellow Resolution: 1cm Product size: 80 x 72 x 40mm Measurement Range: 0.5~18m Units of Measurement: Feet/Meter Power Supply: 1 x 23A 12V Alkaline battery (not included) Package Includes: 1 x Mini Ultrasonic Digital Tape Measure 1x Manual