1、[Mini Size] Small body and compact mode fits in hand perfectly, provides comfortable grip and gives you convenient operation. With a hand strap, you can put it in your pocket or carry it everywhere. Saving effort and time for you. 2、[Quick Measurement] The minimum 0.1 second quick measurement, the multi core processor and the optical lens are dual pronged, the efficiency of the measurement room is significantly improved, and the workload is significantly reduced. 3、[Screen With Backlight Function] High definition backlight is clear and bright, the screen backlight function is automatically turned on during measurement, so that the measurement data is displayed more clearly, which is conducive to the measurement work. The backlight is turned off after 15 seconds of no operation. 4、[IP54 Splashproof And Dustproof] It can be used in different construction environments, and can deal with splashing water and dust intrusion. Ensure that the inner electronic components of the machine are not damaged by corrosion, and the product is durable. 5、[Multifunctional Measurement] Support continuous measurement (maximum, minimum), addition, subtraction (distance, area, volume), area, volume, and Pythagorean functions, assures you a easy and quick measurement to improve efficiency. Item Type: Distance Meter Material: ABS Color: As shown in the picture Model: JQ-40 Power Supply: Rechargeable lithium battery 3.7V 200mAhx1 (built-in battery) Application: Industrial, building distance measurement Charging: USB interface charging Model JQ40 Measurement Accuracy +/-2mm Unit m/in/ft Measuring Range (without reflector) 0.05-40m Measure Time 0.1-3 seconds Laser Class Level II Laser Type 635nm <1mw Dustproof and Waterproof IP 54 Automatically turn off the laser 15 seconds Automatic Shut Down 45 seconds Illumination White LED Measurement Standard Switch √ Data Erasure √ Power Display √ Signal Strength Indicator √ Continuous Measurement (Maximum, Minimum) √ Add, Subtract (Distance, Area, Volume) √ Area, Volume, Pythagorean Function √ 1 x Distance Meter 1 x Data Cable 1 x Lanyard 1 x Instruction Manual