To choose a good alarm system for a vehicle, consider the type of sensors required, if a siren is needed, if detailed documentation for installation and/or installation support is available and if alarm feature expandability is desired. Budget is also an important consideration.
Car alarms come with different types of sensors, such as door sensors, movement sensors, motion sensors, and pressure and microphone sensors. If the budget for a car alarm is small, choose a basic door sensor. Otherwise, pick from among the other sensors, as they are triggered even if the thief breaks a window. These sensors also allow the top of a convertible to be left down. However, they are more difficult to calibrate and may set off a false alarm.
Sirens effectively deter a thief from driving the vehicle away. Particularly, the sirens that are installed inside the vehicle create a very loud sound that is quite painful to the ears. Additionally, it is good to select a car-alarm system with feature expandability, as it permits you to upgrade the system in the future. Some features that can be added include window and door lock controls and remote start.
Also, if a DIY installation is desired to save money, choose those car alarms that come with detailed documentation. This makes installation convenient. Preferably, buy from retailers that offer end-use support for installation.