HP EliteBook 840 Laptop Battery

Wireless presentation tool with a wireless transmitter for controlling Microsoft Office tools and internet pages, a receiver with plug and play compatibility with most OS’s, and a built in laser. If you have a need for large presentations, and want to stand and be heard as well as possible as you zoom through pages of your notes or WebPages, this is the USB computer gadget for you. Simply press the page up and down for convenient control over your presentation, and at the same time point out important details with the long range, powerful built in laser