Bulls-eye Vial Horizontal Vial Laser Opening Power Button Adjustable Vial Battery Cover Magnets Battery Replacement Instructions Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this document before set up or use of this product. 1. The Power Button switches on the laser. Point the Laser Opening away from your eyes before turning on. This laser produces a cross beam. Turn off after use for safety and to extend battery life. 2.