WHOOP 4.0
Quick details
Released
September 2021
Dimensions
35.97 x 25 x 10.1 mm
Operating system
Proprietary
Display None
Battery life Up to 5 days
Water resistance IP68 (10 m, up to 2 hours)
GPS Connected GPS
Sensors Accelerometer, gyroscope, optical heart rate, SpO2, skin temperature, vibration motor
Technical specifications
General
Release date 2021-09-08
Product type Screenless fitness tracker
Physical size 35.97 x 25 x 10.1 mm
Weight 11.3 g sensor; about 28.5 g with strap
Material Sensor body with SuperKnit textile band and metal clasp
Water resistance IP68 (10 m, up to 2 hours)
Color options Arctic Gold, Ivy Rhodium, Onyx Rose Gold and many others
Display type None
Display size Not applicable
Display resolution Not applicable
Display brightness Not applicable
Display protection Not applicable
Battery Rechargeable battery; 192 mAh
Battery life Up to 5 days
Charging Wireless slide-on Battery Pack 4.0; on-wrist charging
Charging time About 150 minutes
Sensors
GNSS type Connected GPS
GPS Connected GPS
GALILEO No
GLONASS No
QZSS No
Beidou No
Accelerometer Yes
Gyroscope Yes
Barometric altimeter No
Compass No
Geomagnetic No
Ambient light sensor No
Optical heart rate Yes
Electrical heart rate No
SpO2 Yes
Temperature Yes
Galvanic skin response No
Microphone No
Speakers No
Vibration motor Yes
Health & activity tracking
Steps Yes
Distance Yes
Calories burned Yes
Floors No
Sports tracking Yes
Sleep Yes
Heart rate Yes
HRV Yes
Stress Yes
Blood oxygen Yes
Respiration rate Yes
Skin temperature Yes
ECG No
Blood pressure No
Body composition No
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Real-time coaching Yes (Strain Target)
Recovery Yes
Strain Yes
Sleep Coach Yes
Health Monitor Yes
Stress Monitor Yes
Healthspan Yes
WHOOP Age Yes
Heart Screener No
Blood Pressure Insights No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis No
Daily smart features
Smartphone compatibility Android 10+; iOS 16+ (iOS 17+ recommended)
Operating system at launch Proprietary
Processor Maxim MAX32652 Cortex-M4F MCU + Nordic nRF52840 BLE SoC
RAM 1 MB SRAM
Data retention Up to 3 days of sensor data
Bluetooth Yes
Wi-Fi No
NFC / connected pay No
UWB No
Cellular No
Smartphone notifications No
Bluetooth calling No
Smartphone music control No
On-board music storage No
Voice assistant No
Links
Affiliate link Whoop
Read more WHOOP 4.0 review
These technical specs are correct to the best of our knowledge at the time of publishing.
