This is illegal to have in your car in any state except WA, whether in use or not, even if it doesn't work you will be fined!
Now thats out of the way.... they are legal to own in QLD just don't take it anywhere near your car
Link to info
do your research for your state then check out this unit it does everything you want including being 'stealth'.
I know Suzuki drivers are tight asses an don't get over the speed limit anyway. Its expensive, however about half retail.
$550 It will be posted to you in an express post bag.