1、According to the measurement principle, the Pythagorean theorem measurement and addition and subtraction operation to get a accurate result. 2、Large LCD display with backlight switch of measurement results for easy reading and detection. 3、It is made of high quality ABS material, anti-earthquake and anti-fall, durable and portable. 4、This is a portable rangefinder with high reliability and high safety, which can measure the distance, volume and area. 5、The units of m, in and ft can be switched and support memory function, can measure the minimum and maximum value. Condition: 100% Brand New Item Type: Rangefinder Material: ABS Optional Type: H-D510A 50m, H-D710A 70m, H-D100 100m, H-D120A 120m Item Specification Range 0.05-50m/ 2in-164ft 0.05-70m/ 2in-230ft 0.05-100m/ 2in-328ft 0.05-120m/ 2in-393ft Range Measurement Accuracy ±2mm Continuous Measurement Function Support Area Measurement Function Support Volume Measurement Function Support Pythagoras Theorem Measuring Function All mode Drawing Function Support Addition and subtraction measurement function Support Minimum /Maximum Support Self-calibration Support Laser level meter Ⅱ Laser-type 635nm, <1mV Maximum Storage 99 group Automatic cut-off laser 20s Auto Power -Off 150s Battery Life 8000 times Button sound Support Storage Temperature -20-60℃ Working Temperature 0-40℃ Storage Humidity Relative Humidity 20％-80％ Battery 3.7V 850mAh Li Battery Angle Range ±90 Size 112 x 50 x 25mm / 4.4 x 2 x 1in 1 x Rangefinder 1 x Portable Bag 1 x Rope 1 x Instruction 1 x Reflector Board 1 x USB Cable