I expanded my fire alarm system from the basement to my bedroom

11:52

System test 23

4:01

Fire drill at school 12-2-24

2:38

System test 10.

14:54

System test 21

3:58

Firelite MS-5012 system test 6: LOUD 🔊

2:43

MS5UD system test 9 generic systems part 2

9:48

System test 20

5:48

System test 18 [Epilepsy Warning] ⚠️