Use your laser pointer to aim at any desired targets on projection screens, video monitors, presentation graphics and any opaque as far as several hundred meters. Human eye is more sensitive to green color and this laser pointer is much more noticeable than other light colors. A best suitable kit for astronomers, professors, teachers, doctors, student presentations and etc. Green laser pointers are brighter (about 60 times) than red laser pointers. Powered by two LR1 1.5V batteries (Batteries included). Wave length: 532nm. Output power: 30mW. Output mode: constant wave.