Laser Pointer 303 with Safety Key & Charger Box Contains Green Laser Light, Safety Keys, Battery and charge. Output wavelength: 532 mm Lightweight and handy, suitable for put in your pocket or handbags Dimension : 16x2.5x2.5cm , Weight 110 g Keep 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.