Output mode:Constant Wave Power supply:AAA Batteries x2 (Not Included AAA Batteries) Dimension:f14×160mm Technical Parameter:Fixed focus, continuous output Green laser Output Wavelength: 532nm Output Power:5mw Working Voltage:DC=3.0V Trigger Voltage:DC=2.8V USE: 1.Press the push button to turn it on,release the push button to shut if off automatically. 2.It will be used to point at any desired targets on projection screens, video monitors, and presentation graphics. 3.Also can be used for forensics, illumination, indicating, alignment, sky pointing (astronomy) or just being cool. USE NOTE: 1.Friendly reminder:The laser is high power .So it runs out of battery quickly.And please don't keep the laser on continuously for more than 20 seconds or it will get burnt from inside easily.3.Remove the batteries when not in use, put the child is not easy to get a place! 4.If you find that the brightness of the laser beam is seriously reduced Please note that to charge the battery or replace battery.