Electronic Level Control Function: With the Electronic Level Control Function ,the angle of the inclination display on the screen, which provides more precise measurement With laser precision technology, accuracy ups to 2mm, measuring distance extends to 50m Switchable among M or In or Ft or InandFt for free adjustment 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 , suitable for using in library, classroom and other quite places,the laser level is ideal for home, construction and industries, especially in large areas such as rooms, apartments, buildings, real estates, factories, warehouses, etc VERSATILITY: Angel(optional), 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 AND PORTABLE DESIGN: IP54 waterproof level and dust-proof function protect the laser distance measure to the maximum extent Portable size and hard rubber body provide a good grip Wrist strap lets you hold the meter steady and carry easily Maximum measuring range:=50m unit of measurement:m or ft or in or ftandin Historical measurement record:30 groups Laser level:Class2 operating temperature:0C-and40C Laser type:630-670nm,Less than 1mw Storage temperature:-10C-and60C (The product appearance and printed words depending on the batch, but this does not affect use) Color: As Shown Material: ABS Package Contents: 1 x Laser Distance Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.