1.All-in-one design, no need to install any software, just plug the receiver into the USB port, you can use it immediately. 2.Compatible with Multiple SystemsThe operating system supports Windows XP, Windows Vista, or Windows 7, Windows8, Windows10, Mac os, and supports Apple systems. 3.Scope of applicationSuitable for weddings, birthdays, housewarming, trade fairs, advertising promotions, employee benefits, anniversary celebrations, business gifts, etc. 4.MaterialImported high-quality industrial-grade laser chip, long life, energy saving and stable, accurate indication. 5.Ergonomic DesignThis laser pointer is designed to fit nicely into your hand; features intuitive touch-keys for easy slideshow control. Delivery quantity: 1set Package Contents: Only the above package content, other products are not included. no battery provided Size: pen: 11.55*3.78 cm; U disk: 5.5*1.4 cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)