Descriptions:  ★HIGH ACCURACY: With laser precision technology, measurement accuracy up to ±2mm, measuring distance extends to 80M; Switchable among M/In/Ft for free adjustment.  ★DURABLE AND HANDY: IP54 waterproof level and dust-proof function protect the laser distance measure to the maximum extent; Pocket size laser measure with a aluminum alloy body looks more high-end and easy to store.  ★MULTIPLE MEASUREMENT FEATURES: Area, distance, length, volume, continuous measurement, Pythagorean method-three points; Addition and subtraction; Low battery indication; 20 groups data memory; Manually delete data; Auto shut down after 150s without any operation to save power.  ★SIMPLE OPERATION: Compared with manual measurement, the Laser Measure greatly reduces the measuring errors. In addition, it comes with electronic angle sensor to provide much preciser and more intuitive data. Assures you a easy and quick measurement.  ★LCD BACKLIGHT AND MUTE SETTING: Large backlight screen provides you with a better visibility in dark areas; Mute setting allows you turn on or off the measure beep at your will, suitable for using in library, classroom and other quite places.  ★ELECTRONIC LEVEL FUNCTION: electronic angle sensor,real-time angle display,When the angle of the rangefinder changes, the angle change can be displayed on the screen in real time. Range: 0°- 90°.     Specifications:  Electronic level: 0°-90°.  Measurement accuracy: ±0.002m.  Resolution: 0.001m.  Measuring range: 0.05m - 80m.  Unit switch: m/in/ft.  Battery: Buil-in battery,USBcharging.  Max/Min: √.  Length/width/height/measurement: √.  Continuous measurement: √.  Area measurement: √.  Volume measurement: √.  Pythagorean measurement: √.  Electronic angle: √.  Measuring Time: 0.1-3s.  Display: LCD with Backlight.  La-ser Class: Class II.  La-ser Wavelength: 635nm.  La-ser Output: <1mW.  Water-proof and Dust-Proof Grade: IP54.  Weight: 50g.  support m/in/ft unit switch.      Self-calibration function:  1) The product is in the shutdown state.  2) Long press the power-on button until 'book' flashes on the screen.  3) Long press the power-on button again until 'CRL.0' appears on the screen.  4) Short press the power-on button to add or subtract adjustment, the range is -7~7mm.  5) After the calibration is completed, press the power-off button to save the settings.     Prompt tone on/off setting:  1) The product is in the shutdown state.  2) Long press the power-on button until 'book' flashes on the screen.  3) Long press the power-on button again until 'CRL.0' appears on the screen.  4) Long press the power-on button again until 'bp.on' appears on the screen.  5) Short press the power-on button to turn off the prompt tone, and the screen will display 'bp.off'.  6) After the setting is completed, short press the power-off button to save the setting.     Package Includes:  1 x Laser Rangerfinder.  1 x English User Manual.  1 x USB Charging Cable