The Garmin Edge 540 is an extensive bike navigation that allows you to measure and read your training data during your bike ride. You can gain insight in your endurance, VO2 max, and recovery time. You can also discover your performance on inclines. With the Garmin Edge 540, you receive recommended daily trainings. You can control the 540 Edge with buttons, which is useful during bumpy rides. Do you like long bike rides? The Edge 540 battery lasts up to 26 hours with GPS on, so you can always get back home. Thanks to accident detection, your preset emergency numbers will be notified if you're in an accident and fall off your bike.