Logitech R800. It provides exceptional functionality in an extremely intuitive format. It offers precise, wireless slideshow control, contoured design for added comfort and an easy to use buttons layout that will enable you to easily navigate through your next presentation with confidence. It features a built-in Class 2 "green" laser pointer, which comes in handy when presenting in bright rooms or when pointing on to plasma/LCD displays. The RF 2.4GHz wireless technology enables you to walk about freely and still remain in full control of your presentations within an amazing 100' range. It's ideal for large conference rooms or classroom environments. Moreover, its offers a convenient LCD display that provides you with timer and wireless reception distance indicators. This intuitive remote offers a built-in vibrating timer, which when pre-programmed, will provide you with inaudible warnings that assist you in managing your presentation delivery time. With its Plug-and-Play technology just simply insert the included USB mini-receiver into your laptop's USB port and your ready to go - a must have accessory for on-the-go users. Its slideshow control allows you to start or stop, move forward or backward, and blackout the screen. Additionally, it features a convenient battery power indicator, on/off switch, and includes a soft carrying case. The Logitech R800 is compatible with Windows 2000, XP, Vista, or Windows 7 platforms. And its compact, ergonomic design offers a professional, comfortable user experience