sigh, just add the brake lock module into your alarm system if you think the speed lock function at 20kmh is insufficient. wat iszit so hard? only cost 100-300+ depends on the brand you are looking for. To me, buying a car and alarm system is the last thing i would concern coz its always better to be done outside. what concern me more about buying a car is stuff that you wouldnt change for a new car for mere normal drivers like engine, gearbox, chassis, suspension and etc.