Note:Battery not include!!!1. For AstronomyServes a helpful tool in astronomic study. If you are a big fan of astronomy、 you gotta have one of these!2. For Safe Field Trips/Exploration/AdventuresServes a good signal for clear direction and emergency.3. For Tour GuidesServes a convenient helper to point at some particular object in a long distance.4. For Construction SitesServes a safe tool to precisely point out remote buildings to avoid dangers on the site.5. For Emergencies: fire、 earthquake、 etc.Serves a distinct signal to indicate the way out.6. For EntertainmentServes a portable and beautiful tool for different recreational occasions to add atmosphere: Karaoke、 parties、 bars、 etc.7.6 in 1?a1 parallel beam light、 and 5 different beam patterns of ?・Starry Sky?・.SpecificationsWavelength: 532nmOutput Power: 1mWBattery: 2 x AAA batteries(NOT INCLUDED)Laser Color: GreenBody Color: BlackLens cap: 5 pcsLength: 16cm (6 3/10?・) x 1.4cm (3/10?・) x 1.4cm (3/10?・)Package Includes1 x 6in1 1MW Starry Sky Laser Pointer Pen Green with Five Heads(BATTERIES NOT INCLUDED)