Specification : * Output power: Max 5mw. * Output wavelength: 532 nm. * Output mode: dot * Press button for ON/OFF. * Powered by AAA 1.5V x 2pcs Batteries not included. * Perfect for teachers， students， engineers， doctors， managers and more. * It's more convenience that use laser point to the target instead of hands. * Pen Length: 15m Package include Laser pointer * 1