Logitech Wireless Presenter R700 $44.50 @ Dick Smith - Free Pickup - Online Purchase Only

Logitech Professional Presenter R700 gives you powerful control for high-impact presentations. Manage your time with silent, vibrating alerts and controls that are easy to set and adjust. The brilliant red laser pointer is easy to see, even in brightly lit rooms.

Features :-

Red Laser Pointer
Wireless Forward / Back for presentations powerpoint and adobe for both mac and pc
Countdown Timer (so you don't run overtime)
Silent alarm (vibration) @ 5 minutes, 2 minutes and 0 minutes (reminder to wind it up)
Bar graph and digit display of how long you have left to go
Also displays how long you have gone over the set time
20m reliable distance, should cover the entire classroom (rated at 30m)
It's tiny ~ 10cm long and comes in a bag
On/Off switch on the side so you don't drain the batteries

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