Product description Bilateral laser Measure Advanced Laser Point 9 Measuring Modes Digital Angle Sensor Auxilliary Reflector Multiple Functions More Features 4 Reference Points Laser Class Green Beam & Class 2 (IEC/EN60825-1/2014), output power <1mW Measuring Accuracy unidirectional ±1/16 inch, bidirectional ±1/8 inch Angle Range ±90° Working Range Bidirectional measure distance up to 393 Feet; Unidirectional measure distance up to 196 Feet Measuring Units M/In/Ft/Ft+in Special Feature Electronic angle sensor Max Data Storage 100 units Display Style Backlit LCD Screen Automatic Shutdown 180s Dimension 4.65 inch x 1.61 inch x 1.02 inch Mount Size 1/4"-20 Power Source USB Charging Port