Small compact red dot sight. Employing new LED technology, the life time for one CR2032 battery can be up to 50,000 hours. The power will be switched on with slight movement of the sight. It may be installed on various firearms such as shotguns, pistols ,air rifles and crossbows. The Model HS403B, different from HS403A, will be perfectly compatible with the standard mounts
Parallax free optical system, with unlimited eye relief.
Minimized obstruction of vision with push button controls and streamlined housing design.