Swing Caddie SC300i Launch Monitor Swing Caddie SC300i Launch Monitor Review: The Complete Package The SC300i Launch Monitor SwingSense Swing Caddie SC300i Portable Golf Launch Monitor Voice Caddie. The SC300i is truly portable and provides golfers with complete swing and ball flight metrics found in professional launch monitors, including launch angle and apex data. Using the latest in Doppler radar technology, and calibrating atmospheric pressure sensors, the SC300i provides uncompromised precision. SC300i connects directly to a personal phone or tablet via Bluetooth allowing golfers to track their real time, integrated data. Voice output of distance and remote control provides the highest levels of user convenience.