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Dimension : 16 cm x 2.5 cm x 2.5 cm , weight 110 gm.Output wavelength: 532 nm.Lightweight and handy, suitable for put in your pocket or handbagsKeep out of reach from children. Avoid direct eye exposure to laser beam. Don't keep the laser on continuously for more than 30 seconds, or it will get burnt from inside easily.Simple press the button to activate the green laser pointer and release it to deactivate,Perfect for teachers, professors, doctors, managers, engineers, dancers, and shooters, star gazer to point out and so on