Features:  - Red and green dual laser.  - 1800mAh Li-ion battery.  - Support a variety of measurement methods.  - M/FT/IN unit switching.  - 20 sets of data storage.     Specification:  Name: dual laser rangefinder.  Green light: Green light pointing function.  Red light: red light measurement, more accurate data.  Measuring distance: 50m/70m/100m.  Minimum display unit: 1mm.  Measurement accuracy: ±1.5mm.  Maximum laser power: <1mw.  Laser wavelength: 635nm.  Continuous measurement: Yes.  Area volume measurement: Yes.  Pythagorean measurement: Yes.  Addition and subtraction measurement: Yes.  Area and volume addition and subtraction: Yes.  Maximum/Minimum: Yes.  Automatic calibration: Yes  Base quantity benchmark selection: Yes . Inclination measurement range: ±90° . Number of stored records: 20 groups. Automatically cut off the laser: 30seconds.  Automatic shutdown: 120 seconds.  Storage temperature: -20℃-60℃.  Working temperature: 0℃-40℃.  Storage humidity: 85%RH.     Package includes:  1 X Dual Laser Rangefinder