99.6% accuracy
Dry ECG electrodes on the chest — a heart-rate accuracy benchmark wrist optics can't reach under load.
01WITU chest strap
99.6% accuracy in training
For when wrist optics lie under load. Dry electrodes on the chest deliver reference-grade heart rate and HRV — right where it makes the difference.
Pricefrom $149
Launch — 2026 H2
Why WITU chest strap
ANT+ and Bluetooth
Broadcasts to Garmin, Zwift, Wahoo and Peloton at once. Compatible with your entire ecosystem.
0230+ hours of battery
A charge lasts weeks of training. Charges over USB-C, with no proprietary docks.
03What it measures
Heart rate99.6%ECG accuracy
HRVR-Rby intervals
VO₂maxTestaerobic fitness
Zones5 zonesby intensity
Specifications
- Electrodes
- Dry, textile band
- Connectivity
- Bluetooth 5.3 + ANT+
- Compatibility
- Garmin · Zwift · Wahoo · Strava
- Battery life
- 30+ hours
- Charging
- USB-C, detachable module
- Sizes
- Band S / M / L
- Protection
- Sweat- and rain-resistant
- Warranty
- 2 years
Who WITU chest strap is for
Running, triathlon, cycling — accurate heart rate
CrossFit and interval training
VO₂max testing and zones
As a companion to the WITU bracelet outside of sport
WITU is a wellness device, not a medical device
Insights are provided for general wellness and informational purposes only and are not intended to diagnose, treat, or replace professional medical advice. If you have any health concerns, consult a qualified healthcare provider.