Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to choose a car alarm [title] Choose which type of car alarm you want. [step] There are two main types of car alarms: passive alarms and active alarms. [substeps] Passive alarms will automatically be armed after the car ignition is off and all the doors are closed.

Ending1: Active alarms require you to press a button to arm the system. [title] Choose what features are right for you and your needs. Ending2: They will automatically fire if the driver agrees to become alert. Active alarms will not fire when the car is stopped. Ending3: Passive alarms will have low battery charge because they are inactive, and attach to the ignition light and turn on. Active alarms will emit 5-12 beeps every time a car locks up in high alert mode. Ending4: They are also completely nonfunctional in nature. A passive alarm will only go off when someone is leaving the car, so active alarms are not often, if at all, equipped.

Answer format: ending1/ending2/ending3/ending4