Huepar 603CG-BT 3D Green Laser Level with Bluetooth Specifications. Laser Class: Class 2 (IEC/EN60825-1/2014). Horizontal/Vertical Accuracy: ±1/9 inch at 33Ft. Working Distance (Line): 130Ft (100 LUX), 200Ft. With Huepar Receiver LR-5RG/LR-6RG. Operating Time with Lithium Battery: 7 hours with all laser beams on. Operating Time with AA Batteries: 2 hours with all laser beams on.