Professional presenter R800 with cordless USB connection type. Powerful and easy to see even on LCD, plasma displays and in brightly lit rooms. Keep track of time, battery and wireless reception with a glance or with silent, vibrating alerts. You remain focused on your presentation, not the clock. You will enjoy the freedom to move around the room and mingle with your audience for greater impact. Reception-level indicator ensures you do not wander too far. Buttons are easy to find by touch. The smooth contours feel great in your hand. You will be in control from the first slide to the last. There is no software to install. Just plug the receiver into a USB port to begin. When the show is over, you can store the receiver in the presenter.