Cross Line , Accuracy +/-1/16 in @ 10 ft, Battery Type Not Applicable, Bluetooth Not Bluetooth Compatible, Features Cylindrical Lens Technology - Solid Glass Optical System Draws a Continuous Line at Any Distance, Hard Anodized - Scratch Resistance Housing, Diode - Rated for 10,000 Hours of Operation or 5 Years Normal Operating Condition, Line Fan Angle - 70 Degrees, Line Widths - 1/16 in, Push On/Off Switch - Turn Unit on and Off with out Having to Disconnect Power