O'Beam Golf Training Aid Improve Your Putting with 'O' BEAM Laser based Putting Practice Aid Keep your head still Lower your putting score Simple to use Endorsed by Chip Beck, Champions Tour Professional The 'O' BEAM device is worn on the visor portion of your hat. With the power switch in the ON position, 'O' BEAM shoots a laser beam that you position on the ball. When you address the ball, 'O' BEAM's laser allows you to correct any movement of your head. Less head movement leads to better putts and lower scores. Testimonials O' BEAM is the best putting aid I have ever used. It clearly helps you to minimize head movement which results in more solid putts and lower scores A must have for every golfer! Chip Beck , Champions Tour Professional