Google Fitbit Air fitness tracker in Obsidian, a screenless, ambient tracker that sits on the wrist. Includes three months of Google Health Coach through the Fitbit app for personalised coaching, plus advanced sleep tracking and 24/7 heart rate tracking. Monitors steps, calories and distance, with SpO2 monitoring and skin temperature variation tracking, and auto-detects runs, walks, bike rides, swims and rowing sessions. Lightweight and micro-adjustable, with a seven day battery life and five minutes of charging giving a full day's use. Connects via Bluetooth, and works with Google Assistant. Water resistant up to 50 metres, with a date display. Unisex, compatible with iOS and Android.