4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA 1. [Ergonomic Design] Unique curved design, the wireless presenter remote conforms to ergonomics, so it not be sore when held for a long time.<br> 2. [Wireless Connection] Using 2.4Ghz wireless technology, the presentation remote pen can remotely control the demonstration at about 10 meters.<br> 3. [Multi Functions] Comprehensive slide presentation functions, including forward, return, pause, start and black screen functions<br> 4. [Wide Application] This wireless presenter remote is a practical tool for teacher and worker to present for speech, meeting or class.<br> 5. [Widely Compatible] This presentation clicker is suitable for Win 98,for Win se, for Win me, for Win 2000, for vista, for<br> Item Type: Presentation Clicker<br> Control Distance: Up to 10m(. 10m / 10.9ys)<br> Adapter Battery: 1 AAA Battery (Delivery Without Battery)<br> Compatible Interface: USB 1.0 / USB 2.0<br> Uses: Conferences, Lectures, etc.<br> Compatible System: For Win 98,for Win se, for Win me, for Win 2000, for Win xp, for vista, for<br> Colour:black<br> Material:plastic<br> Package Contents:<br> 1 * Presentation Clicker<br> 1 * Wireless Receiver<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.