Fangrui Product Details 1: Pythagoras Function For Remote Measuring Of Height Or Length 2: Addition / Subtraction Calculation And Areaolume Measurement 3: Backlit Display Shows Multiple Readings. 4: Audible Alarm Name:distance Meter With A Measuring Range Of 0.05-40m Laser Auto Off:60s Power Auto Off:60s Measuring Distance:0.05-40m Accuracy:1.5mm/0.06in Measurement Units: M/in/ft Laser Type:red Laser, 635nm, Less Than 1mw, Class Ii Operating Temperature:0-40(32-104 Battery:powered By 200ah 3.7v Dimensions:100mm X 12.5mm X 32mm Weight:100g Electronic Level:with Level Colour:silver Material:aluminum Alloy+abs Package Contents: 1 X Usb Charging Cable 1 X Lanyard 1 X Rangefinder 1 X English Instruction Manual 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.