Portable Compact Ultrasonic Range Finder Distance Measurer

This ultrasonic range finder can be used when requiring the measurement of an area of a room which is intended for measuring distances lengths and heights in a straight line from 1.64ft to 49.21ft and be able to calculate the areas and volumes.Features:Compact Design: the size of 5.232.631.77in perfectly fits your hand which can be held firmly without the trouble of too big to operate.Easy Operation: press '+/=' button and '/=' button at the same time to convert a given distance into foot or meter; 'READ' button to measure the length width and height; just press 'READ' twice to end the area/volume calculation.Multifunction: functions of addition multiplication and measurement of area and volume.Auto power off after not being used for over 30 seconds; low battery indication.Accurate Laser Measurement: with laser point Class II product 1 mwpower output.This ultrasonic distance meter transmits ultrasonic waves to the surface you want to measure and then measures the time take by the waves to reflect.Specifications:Material: ABSColor: RedPower Supply: 1 x 9V Alkaline type 6F22 battery(battery Not included)Measure Units: Foot or MeterRange: 0.5m-15m (1.64 to 49.21ft)Accuracy: 0.5%Frequency: 40 kHz(ultrasonic pickup)Working Temperature: 0? to 40? (32? to 104?)Automatic Switch Off: 30 secondsHazard Class of Laser: Class II acc. to EN60825-1: 2014;Wave Length: 650nmMax. output: 1 mwItem Size: 13.3*6.7*4.5cm / 5.23*2.63*1.77inPackage Size: 14*7.3*4.7cm / 5.51*2.87*1.85inItem Weight: 100g / 3.52ozPackage Weight: 127g / 4.47ozNote:Please carefully read the User Manual before use.Risk of eye injury due to laser beams!KEEP AWAY FROM CHILDREN.Package List:1 * Range Finder (battery Not included)1 * User Manual?English?