WHOOP Life Onyx Health & Fitness Tracker Heart Rate Sleep & Activity Monitor

The Whoop Life Onyx is an advanced health and fitness tracking wearable featuring continuous monitoring in a sleek onyx black design. This wireless device connects via Bluetooth to smartphone (iOS/Android) for data syncing (range approximately 10m). Built-in rechargeable lithium battery provides approximately 4-5 days continuous usage per charge with wireless charging via included battery pack (charges in 1-2 hours, battery pack charges via USB cable). Features 24/7 heart rate monitoring, advanced sleep tracking with sleep stages analysis, activity and strain measurement, recovery score calculation, respiratory rate, blood oxygen (SpO2), skin temperature, and HRV monitoring. Screenless design focuses on data collection with all metrics viewed via Whoop smartphone app. Water-resistant design (waterproof up to 10m) suitable for swimming and showering. Soft, breathable band comfortable for all-day wear. Automatic tracking requires no button presses - continuously monitors health metrics. Requires Whoop membership subscription (purchased separately) for full feature access including personalized insights and coaching. Compatible with iOS 14+ and Android 8.0+. Package includes Whoop Life Onyx sensor, onyx band, wireless battery pack, USB charging cable. Sensor dimensions approximately 3.5cm x 2cm x 1cm, weight approximately 20-30g with band.