This golf rangefinder is very popular with golfers and people who like outdoor exercises. The multifunctions will meet all your needs well. And it's portable at the same time. Multiple functions:1.Slope Measurement and Flag-lock 2.LCD Touchscreen Color Display3.Multiple Application Modes4.USB Charging Specifications:Product Size:109X70X40mmLaser Wavelength:905 nmWeight:189gWorking Temperature:20-50Telescope Object Diameter:25mmRanging Scope:5-1500mLens Quality:Multilayer coatedRanging Error:0.5mOperating Humidity:80 percent Ranging Resolution:0.5mExit Pupil Diameter:3.8mmAngle Ranging Scope:0-90Exit Pupil Distance:12.0mmAngle Ranging Accuracy:0.5Protection Class:IP54Angle Display Resolution:0.5Telescope Magnification:6.0XPower Supply:Lithium battery or CR-2(3V)Focusing Mode:Manual focusing eyepieceRanging Display Mode:Transmissive LCD display in the field of viewRanging Method:Semiconductor laser ranging(safe for human eyes)