Acromeet Laser Pointer (LP-R-100) is a good Demonstration Instrument.
1. Ultra portable and simple setup.
2. Superior resistance to ambient lighting.
3. High resolution smooth drawing within 1 pixels' jitter at 1024x768.
4. Quick response time ideal for quick drawing and writing.
5. Dual connection interfaces provided: USB and COM ports. (COM port supports long distance cable installation up to 40m).
6. Lower power consumption, prolong notebook PC battery life.
7. No device/ cable attached to whiteboard/ projection surface.
8. Supports interactivity on both hard and soft screen of any size up to 150' '.
9. Extendable Pointer E-Pen and Stylus E-Pen (optional) provide an intuitive and powerful "touch screen" and annotating interface.
10. Streamlined design - easy to mount on both desktop and ceiling.
11. Automatic real-time whiteboard recording.
12. Supports soft-pen effect writing, spotlight and screen shade features