Features: HD display screen, data display clear, data can be added and subtracted. Reasonable data storage can go through the history data. Compact size and light weight, convenient to carry. Adopt LCD backlit display, convenient to read data in the dark. Easy to operate and maintain, superior performance. Specification:Material: Plastic & Aluminum alloyWeight: 145g/5.1ozColor: BlueMeasurement range: 0.05-40m, 0.05-60m, 0.05-80m, 0.05-100m (Optional)Measurement accuracy: ± 2mmLaser grade: Class 2M IILaser type: 620-690nm,<1mWThe measure of area: YESVolume measurement: YESMeasurement of the Pythagorean theorem: YESAddition and subtraction method: YESTracking measurement:YESMaximum and minimum measurement: YESBack light: YESBeep tips :YESData removal: YESData storage: 20 groupsDust and water: IP 54Operating temperature range: -10~40℃Storage temperature range: -20~70℃Battery life :5000 ~ 8000 measurementsPower supply: 2* AAA LR6 1.5V (NOT included)Laser Auto off: 30sPower Auto off: 3minInstrument size: 11.5*4.9*2.5cm/4.5*1.9*1inchPackage List:1* Digital Rangefinder1* Hanging cord