well tested and high quality blue laser pointer.
clearly visible in dark.
focus is adjustable.
the laser pen can light matches and cigarettes.
works very well both underwater and outside of water
easy to use,only need to push the button then you can see the blue beam.
the light can point at any targets,blackboard, video monitor and so on.
best choice for teachers, doctors, professors and so on.
battery: 3.7v 750mah
output power: 2000mw
irradiated range: 1000m
material: aluminium alloy
color of laser: blue
product details (including package):
1 x laser pointer pen
1 x 3.7v battery
1 x user manual