As someone suggest, I tried install inside the windscreen, and it works. You can test it out before fully install it.

Yes, I know the tag should be installed outside the windscreen/headlamp. But feel less secure and cost money to install again if someone break it or remove it lol...

Initially I installed it with selefon tape to test at few toll booths with RFID scanner to see if it can scan through my windscreen tint or not then I only use transparent roadtax sticker to stick it. Test at your own risk lol.

How your testing?its working or not?
And may i know which brand u use for tinted. I plan to install inside windshield.now using tinted 3M

Isn't it supposed to be installed on the head lamp?
Will it works if my Wind screen got tinted?

I'm thinking to get one for my car, is the RFID on the Highway toll reliable nowadays?
Can anyone comment, thanks

Does the rfid booth have alternative payment method? plan to try have it on the road tax sticker, but afraid fail to detect.

I put mine on top left as per instructions, don't have any problem for the past 3 years. This year a few toll have new RFID lane and I start to have problems with it. sometimes have to reverse and go forward again to be detected