WHOOP 4.0 Device Smart Band
WHOOP 4.0 Device Smart Band
DISCOVER THE NEXT GENERATION
The WHOOP 4.0 is smaller, smarter, and designed with new biometric tracking, including skin temperature, blood oxygen, and more.
Wear It Anywhere
Comfortable enough to wear non-stop thanks to new, durable SuperKnit bands, but flexibly designed to be worn off your wrist in new WHOOP Body apparel.
Wake Up At The Optimal Time
Set a haptic alarm that gently vibrates to wake you at the optimal time based on your sleep needs and cycles.
Monitor Your Health
A robust sensor suite allows you to monitor your key vital signs: Blood oxygen levels, skin temperature readings, and heart rate metrics.
Get More Accurate Data
5 LEDs and 4 photodiodes capture your data more often than most wearables, providing best-in-class accuracy validated in lab studies and with third-party testing.
Track Metrics 24/7
Wirelessly charge your WHOOP with a waterproof* battery pack and capture data continuously—even while in the shower or washing dishes.
WHOOP APP
Get real-time feedback on your Sleep, Training, Recovery, and Health, plus in-app coaching features to help you optimize performance.

Sleep Better
WHOOP monitors your sleep cycles, debt, performance, and quality, to help you know how much sleep you need every night.
Train Smarter
WHOOP measures and accumulates your training activities and daily effort with a Strain score that helps you understand when to rest or push.
Recover Faster
WHOOP analyzes your key metrics like HRV and resting heart rate to determine a daily recovery score, and shows you how specific lifestyle and training behaviors affect Recovery.
Feel Healthier
WHOOP now measures your blood oxygen levels, skin temperature, heart rate, and more, so you can see when you’re making progress, or when something’s off your baseline.
Manage Stress
WHOOP measures your stress level in real-time using HRV and heart rate. Stress Monitor gives you a personalized stress score from 0 to 3 and suggests science-backed breathwork sessions to either increase alertness or relaxation.
Guaranteed Safe Checkout
Guaranteed Safe Checkout
12 % Koko Commission Calculated on Checkout
3 % Commission Calculated on Checkout
Contact seller for payment options
Warranty Information
Warranty Information
Final Sale on Change of Mind:** Once your purchase is made, it's yours to keep. Returns and refunds are not accepted for a change of mind.
Unyielding Quality, No Physical Damage:** We stand by the durability of Mr. Watch. Refunds or returns will not be granted for any physical damage.
Water-Resistant, Not Invincible:** While Mr. Watch is water-resistant, please note that water damage is outside of our warranty coverage.
Our policy is simple—confidence in your purchase, commitment to quality.
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