The Google Fitbit Air is an ambient fitness tracker with a screenless design - it sits quietly on your wrist and tracks your health without distracting you from your workout. Pair it with the Fitbit app and you can use Google Health Coach for three months. It gives you personalised coaching that adapts to your activity, so the guidance you get actually fits your life. Advanced sleep tracking using new algorithms helps to build a detailed picture of your sleep pattern, so you understand exactly what rest your body needs. And it's water resistant up to 50 metres so it's just as happy in the pool as it is on your morning run.Good to know- The lightweight, micro-adjustable fit is comfy enough to sleep in- Track your steps, heart rate, calories and distance all day long- SpO2 monitoring keeps tabs on your blood oxygen levels- Skin temperature variation tracking helps you to spot patterns- It auto-detects runs, walks, bike rides, swims and rowing sessions- The seven day battery life gives you a full week of tracking- Five minutes of charging gives you a full day's use- Bluetooth keeps your tracker and phone reliably connected