This high-quality laser pointer incorporates the latest technology in green laser optics and Microelectronise.Use your laser pointer to point at any desired targets,project screens,or video monitors,presentations museum and tour guides,point at the stars, and inspection... Instruction: Press the button switch to turm the laser ON. Release the switch to turn it OFF. Insert batteries: Unscrew the end cap,insert batteries with positive end upward and screw the end cap. Laser Type: Visible laser Diode Wave Length: 532nm Output power: 5mw Beam Distance: over 500-8000meter Battery: AAA x 2