Lowest price ever on the Withings Go – Activity and Sleep Tracker! Get it right now for only $49.95! Activity: Track steps, running, swim (water-resistant to 50m/ 165ft), calories burned & distance Sleep: Monitor your light, deep & awake cycles; Easy to use: High-readability E Ink screen & up to 8-month battery life. Wear-it-your way: On your wrist, clipped or simply in your pocket Coaching on