The Google Fitbit Air is a lightweight, screenless activity tracker designed for 24/7 health monitoring. Here are the key specifications for the device:

Design & Build

• Dimensions: 34.9 × 17 × 8.3 mm
• Weight: 5.2 g (tracker housing) / 12 g (including band)
• Materials: Recycled polycarbonate and PBT plastics housing; textile band with stainless steel buckle
• Water Resistance: 5 ATM (up to 50 meters)
• Indicator: Status LED light for battery level and device status (double-tap to wake)

Health & Fitness Tracking

• Sensors: Optical heart rate monitor, red and infrared sensors (SpO2), device temperature sensor, 3-axis accelerometer, and gyroscope
• Metrics: Continuous 24/7 heart rate tracking, sleep stages and quality, blood oxygen saturation (SpO2), skin temperature variation, heart rate variability (HRV), breathing rate, steps, distance, and calories burned
• Alerts: Irregular heart rhythm notifications (potential AFib detection), high/low heart rate alerts
• Exercise: Automatically recognizes and records many activities; supports over 40 exercise modes via the Google Health app

Battery & Connectivity

• Battery Life: Up to 7 days on a single charge
• Charging: Proprietary magnetic charger; 5-minute quick charge provides 1 day of battery life; 0–100% in approximately 90 minutes
• Connectivity: Bluetooth 5.0
• Compatibility: Works with Android 11+ and iOS 16.4+ via the Google Health app

Features & Services

• AI Coaching: Includes access to personalized AI-powered coaching (built with Gemini) via the Google Health Premium subscription.
• Data Storage: Stores detailed motion data for 7 days and daily totals for up to 30 days when disconnected from the app.