Good afternoon, I have an X28 alarm unfortunately I do not know how to locate the model since the car I bought it used and already came with the alarm installed. The alarm works correctly but it ran out of sound in the siren (both for when it tells you that the alarm is activated as for when it has to sound at any inconvenience), the sound is not cut off from one, but was running out of sound of little by little making noise at can every time I lost volume. Now it makes no noise. Thank you in advance for your help! Regards