Assertion: laser pointer | /r/HasProperty | class
Facets:
Source sentences:
text: Laser pointers may be class 1, class 2, or class 3A, using the American classification; or class 1 or 2, using European codes of practice.
text: Laser pointers may be class 1, class 2, or class 3A, using the American classification; or class 1 or 2, using European codes of practice.
text: The 5 mW green laser pointers (classes II and IIIa) are the safest to use, and anything more powerful is usually not necessary for pointing purposes, since the beam is still visible in dark lighting conditions.[citation needed]