WHOOP Band 4.0

The WHOOP Band 4.0 is not a smartwatch—it’s a dedicated physiological monitoring system. With Any‑Wear™ Technology, it can be worn on the wrist, arm, or integrated into WHOOP Body apparel. It’s 33% smaller than WHOOP 3.0, yet more powerful, offering advanced metrics like heart rate variability (HRV), skin temperature, blood oxygen saturation (SpO2), and respiratory rate. WHOOP 4.0 also introduces Sleep Coach with haptic alerts, waking you at the optimal time with gentle vibrations.

Detailed Specs

Design & Build

• 33% smaller than WHOOP 3.0, with a sleeker and more discreet profile.
• Lightweight design (~27g with strap) for all‑day wear.
• Waterproof construction suitable for swimming and showering.
• Any‑Wear™ Technology allows wearing on wrist, bicep, or integrated into WHOOP Body apparel.
• Strap‑based design with no screen, focusing on continuous monitoring.

Sensor & Tracking Capabilities

• Advanced sensor suite with 5 LEDs (green, red, infrared) and 4 photodiodes.
• Tracks heart rate variability (HRV), resting heart rate, respiratory rate, SpO2 (blood oxygen saturation), and skin temperature.
• Continuous monitoring of strain, recovery, and sleep.
• Health Monitor dashboard provides real‑time metrics.
• Exportable 30‑day or 180‑day health reports for coaches or physicians.

Sleep & Recovery Features

• Sleep Coach offers personalized recommendations for optimal rest.
• Haptic alerts wake users at the best time in their sleep cycle.
• Tracks sleep stages, disturbances, and recovery quality.
• Provides daily recovery scores based on HRV and resting heart rate.

Battery & Charging

• WHOOP Battery Pack 4.0 is waterproof and allows on‑the‑go charging.
• Powered by Sila’s silicon anode battery technology, offering 17% higher energy density.
• Up to 5 days of battery life per charge.

Connectivity & Compatibility

• Bluetooth Low Energy (BLE) for syncing with smartphones.
• WHOOP app available on iOS and Android.
• Subscription model includes hardware and access to analytics.

Why Choose the WHOOP Band 4.0

• Continuous monitoring of strain, recovery, and sleep for performance optimization.
• Accurate physiological insights with advanced sensors beyond standard fitness trackers.
• Sleep coaching with haptic alerts ensures better rest and recovery.
• Compact and discreet design without a screen, focusing purely on health data.
• Waterproof and durable build suitable for athletes and active lifestyles.
• Exportable health reports for trainers, coaches, or medical professionals.
• Subscription model ensures ongoing updates, support, and access to WHOOP analytics.