Features:The ULTRASONIC DISTANCE METER + LASER POINTER 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 10m. 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.Please Note:1. The laser emitted from the unit is visibale laser of 650nm wavelength.2. Don’t stare into the laser beam and also don’t shoot laser beam to any other’s eyes.100% brand new， high qualityUnit of Measement Feet or MetersAccuracy 0.5% +1 digit (2-60ft)Resolution: 1cm or 1/2 inchMeasure Distance From 0.5m to 10mArea， volume， addition， subtraction calculation.Frequency: 40kHz (ultrasonic pickup)LCD with Backlight.Power supply: 1 x 9v Alkaline Battery (not included)Dimensions: 155mm x 70mm x 30mmWeight: 120gPackage includes:1× Handheld Ultrasonic Laser Point Area Volumn Distance Meter Feet Measure (with packing)1× User Manual