Product description Laser Class Green Beam & Class 2 (IEC/EN60825-1/2014), output power <1mW Special Feature Electronic angle sensor Power Source 3.7V 850mAh Lithium Battery Measuring Accuracy ±1/16 inch Angle Range ±90° Working Range Bidirectional measure distance up to 393 Feet; Unidirectional measure distance up to 196 Feet Max Data Storage 100 units Display Style Backlit LCD Screen Measuring Units M/In/Ft/Ft+in Automatic Shutdown 180s Mount Size 1/4"-20 Dimension 4.65 inch x 1.61 inch x 1.02 inch Brighter Green Beam 9 Measurement Modes Dual Green Laser Digital Angle Sensor Multiple Functions More Features Auxilliary Reflector