Glovion All-in-one Compact Pen Style with Clip Wireless Presenterexpert with Red Pointer and Powerpoint Presentation Remote Control Clicker (Black) Pen style with clip , easy to carry Compact wireless presenter with an ergonomic design and easy fingertip control, and a bright, easy-to-see RED pointer Wireless USB receiver fits inside controller's storage space so it never gets lost 2.4GHz wireless technology delivers interference-free control of your pointer from up to 55 feet away, Page up and page down functions with integrated red pointer. Powered by 1 pc AAA battery ( included ) Ideal for PowerPoint or computer presentations .Plug and play with no software to install. Best Assistant for office tool or Teacher's gifts