Only 1mW, unfortunately. The most powerful you can buy legally. 532nm wavelength.
Why is your legal limit so low?
I think it was because there was a spate of kids bringing them into schools and doing mischief to teachers and other students a few years ago.
Also, I am suspect that it actually isn't just 1mW since it's also listed as a classIIIb laser, which (according to the fountain of all knowledge) range from5-500mW. It's definitely a low-powered one though since the beam is just about visible in bright light. (Clearly visible if I spray some aerosol around first.)
I think I could have the same one as you Chris,
from Amazon(?). Yes, I was a little curious as to why it says class IIIb when it's only 1 mW. Is seems pretty bright for 1mW but that could just be because its green, and also I've got nothing to compare it to.
Apart from that it's what I expected. Really good at night, at lease 800 meters (off a building near my house).