STEALTH 50 GPS WITH ANT+ HR & SPEED/CADENCE SENSOR Simple GPS cycle computing! Using GPS technology the Stealth delivers all your usual easy to use Cateye features and functions to the head unit, without sensors on your forks or chain stays. Once home simply plug your head unit into the USB docking station provided and download your ride data to CATEYE Atlas to review on maps and graphs; your route, speed, altitude data etc., and share with friends via Facebook or Strava if you like!