Quite a good alarm for its price. Sturdy controls, although a bit childish in their design. The activation distance is comfortably 70 meters, its sensitivity to vibrations is adjustable and works perfectly. You lightly hit the car anywhere and it gives you a warning tone, hit it again and the alarm is activated. It has automatic safety locking as soon as you put the vehicle in gear. Strong LED signaling inside the vehicle. Overall, it is an alarm that provides enough difficulty for a capable thief to violate. It is not, therefore, "Chinese". The only drawback it has, and for this reason, I give it a low rating, is its siren. Not only is its volume very low, but it also has a quite strange and sluggish sound. In short, it is an excellent alarm for its price, as long as you replace the siren or keep the old alarm, as I did.