[header] How to choose a combo alarm system for a car [title] Visit a dealer. [step] Ask if your car dealership can recommend a car combo alarm system. As a professional, your car dealer will most likely know which types of alarm systems are available for your car and which are most compatible. 
[title] Take a minute and think about which specific car alarm features would be useful to you. [step] Though all combo alarm systems for cars combine a number of features, each system offers different a combination.