How to determine whether it is a Class IIib green Laser pointer？

Technically? It is possible (sometimes) to reach the end of the universe. But really, it depends on the laser pointer. Today, some "laser designators" outside China are so powerful that they look like lightsabers, scattering dust particles in the atmosphere. Most laser Pointers produce milliwatts of power. If highly collimated, this is great for mileage. The green laser pointer beam can be seen at night and during the day, especially at night. Blue laser designators with output power can be used for demonstration purposes, while lasers with higher power typically have longer beam visibility. In our daily life, people can use green laser Pointers to make demonstrations in business meetings, speeches, classrooms, conferences and so on, while playing a particularly important role in astronomical research.