Been looking for good wireless presenter. Found this Logitech R400, the better version would be R800 (double the cost, of course). JB Hi-Fi currently discount it 25% off from RRP$79 = $59.
Pricematch it later with Officeworks for further 5% off. You may find it even cheaper from eBay or Umart. But for the sake of warranty purposes in case needed, i surely vote for Officeworks though cost little bit more.
Cheers.
Umm, even myer has it cheaper…
http://www.myer.com.au/shop/mystore/electrical/computer-acce…