Alarm method of use:
(Normal mode) primary gunners - if you are a beginner gunners please set Normal mode: need to aim at the target sent a gun can stop alarm.
(hard-core mode) senior Arsenal - if you want more difficult design methods, please set difficulty mode: 3 minutes at least five gun before closing injection alarm.
Q: so 3 minutes if you missed the chance to open shot five times?
A: stop alarm, But every five minutes on time!