Google Fitbit Air Activity Tracker, Obsidian

The Google Fitbit Air Activity Tracker (GA09509-EU) in Obsidian is a wrist-worn health monitor designed for continuous data collection without a screen. This tracker maintains a discreet profile for monitoring daily routines and sleep stages. It tracks heart rate via an optical sensor and includes arrhythmia detection for irregular heart rhythms. Additional sensors measure blood oxygen saturation (SpO2) and skin temperature to monitor overall physiological status. Activity and sleep data are recorded automatically for review in the connected app. The design prioritises data collection over user interaction.

The tracker features a polymer case and a textile strap for a lightweight feel. It is compatible with Android 11.0 or later and iOS 16.4 or later. In the absence of a display, it uses vibration alerts for notifications. The rechargeable battery lasts up to seven days on a single charge, with integrated indicators to warn when the power is low. This model comes in Obsidian and is designed for consistent daily wear.

• 5 ATM water resistance allows for swimming at depths of up to 50 metres
• Bluetooth 5.0 ensures a stable connection for syncing data with smartphones
• Adjustable strap fits wrists from 130 mm to 210 mm for a comfortable fit
• Battery indicators show the remaining power status
• 1.5-hour charging time restores the internal battery to full capacity
• Lithium-polymer battery provides power in a compact, wrist-worn form factor