Garmin Edge 20 Cycling GPS COMPACT - Weighing only 25 g (0.9 oz.), Edge 20 and Edge 25 are the smallest cycling GPS computers in the world, making them perfect for travel GPS +GLONASS - Acquire satellites quickly to track how far, how fast and where you ride - even under tree cover. The Garmin Edge 20 and Edge 25 are the first in this size and price range to add GLONASS EASY-TO-USE - Simple interface makes it easy to start, save and share activities. The crisp, clear display makes it easy to read. COURSES - Download courses from Garmin Connect and follow them on your device, receiving turn prompts throughout