About the Blue Tees Golf Rainmaker Portable Launch Monitor
The Rainmaker is Blue Tees Golf's portable launch monitor and its one indoor-golf-relevant product; the rest of the range is rangefinders. It runs on Doppler radar with an onboard TFT display and reports ball speed, spin rate and club speed. It works standalone at the range or paired with the Blue Tees LAUNCH app for simulation and session tracking. The maker describes the housing as waterproof.