Specifications: 1) Battery: CR123 2) Laser type: laser pointer 3) Wave length: 532nm 4) Output power: 5mW, 10mW, 20mW, 30mW, 40mW, 50mW, 80mW, 100mW, 120mW, 150mW 5) Beam distance: over 3,000 - 10,000m 6) Applicable to newspaper clipping and conference 7) Used in all kinds of teaching and lectures 8) Used as guidance for residents in mountainous areas