BLUE TEES GOLF SERIES 3 MAX+ LASER RANGE The Series 3 Max+ Laser Rangefinder is the next iteration of our flagship, best selling S3 line of lasers. S3 Max+ offers improved software + electronics, an enhanced ergonomic design, and is powered by our new rechargeable battery technology. The Slope Switch enables the golfer to see slope compensated distances on the display. It can be toggled on or off to comply with USGA regulation. The Red/Black Control button allows you to manually change the display color to your preferred setting based on the environment (high/low light).