Saw it last night. The cheapest detector is about RM 40.00 @ Jln. Pasar roadside stalls too can get. Maybe someone can buy and check with the "periuk" thing and post out findings here. On another thought. Isnt closing the car's boot almost like puting the laptop in a periuk? of course there are gaps in the in the baclight areas etc.

Actually there are ordinary devices that are legally sold, but with a little mod with chip those can be used as scanner. Just go to the key maker stalls/shops they also make use of these scanner to duplicate your radio signal frequency keys. To open cars they use frequency generators. Nowadays those gadgets are very compact and mobile, digital somemore.