Viiiiva Heart Rate Monitor
4iiii Launches New Viiiiva Heart Rate Monitor With Class‑Leading Battery Life and Comfort
4iiii has introduced the latest generation of its Viiiiva Heart Rate Monitor, delivering a huge 540+ hour battery life, improved comfort, and seamless compatibility with the brand’s PRECISION 3+ power meters.
A Heart Rate Monitor Built for Accuracy and Durability
The new Viiiiva uses a high‑sensitivity chest strap to measure the heart’s electrical activity with medical‑grade precision. Its lightweight design and soft strap improve comfort during long sessions, while an IPX7 waterproof rating ensures reliable performance in all conditions. With both ANT+ and Bluetooth connectivity, the Viiiiva pairs instantly with bike computers, watches, and indoor training apps.
Designed to Work Seamlessly With PRECISION 3+ Power Meters
4iiii positions the Viiiiva as the ideal partner for its PRECISION 3+ power meters. Power data shows an athlete’s external output, while heart rate reveals internal physiological response. Used together, they provide a complete view of training load, efficiency, and recovery.
This combination helps riders track fitness gains, set accurate training zones, and manage intensity across every ride. For athletes using 4iiii power meters, the Viiiiva adds the missing half of the performance equation.
Insights From 4iiii and Their Athletes
Phil White, President of 4iiii, said:
“Heart rate and power are extremely valuable metrics for any athlete. The Viiiiva completes that equation for athletes using our power meters, providing both the internal and external view of performance. It offers the same level of accuracy and durability that defines our power meters, so you can trust your data in any conditions.”
Former WorldTour rider and 4iiii ambassador Alex Dowsett added:
“Power and heart rate aren’t competing metrics, they’re complementary. Power shows what you’re producing, heart rate shows how your body is responding. The Viiiiva and PRECISION 3+ pairing gives you both with total reliability.”
Key Features of the New Viiiiva Heart Rate Monitor
- 540+ hour battery life from a single CR2032 coin cell
- Lightweight design under 46g including battery
- ANT+ and Bluetooth for universal device compatibility
- IPX7 water resistance for all‑weather training
- Accurate heart rate measurement from 30–240 BPM
- Adjustable chest strap for 66–132cm (26–52″) chest sizes
You can find out more about the Viiiiva on the 4iiii website.
