### Question
How does the law define smoke detector?


### Answer
Under *15 U.S.C. § 2225*, **smoke detector** is defined as:

> an alarm that is designed to respond to the presence of visible or invisible particles of combustion

#### Citation:
  - *15 U.S.C. § 2225*
  - Heading: **CHAPTER 49-FIRE PREVENTION AND CONTROL**

