Description
4iiii Viiiiva Heart Rate Monitor V2
With unmatched battery life, rugged water resistance, and dual ANT+ and Bluetooth connectivity, the 4iiii Viiiiva Heart Rate Monitor V2 ensures you never miss a beat - literally.
Unrivalled Accuracy for Smarter Training
The Viiiiva doesn’t just track your heart rate, it reveals the true story of your effort. By providing real-time, lab-grade data, it helps you fine-tune your training zones, optimise recovery, and push your limits with confidence. For cyclists who rely on data to drive progress, the Viiiiva eliminates guesswork, allowing you to train smarter, not harder. Pair it with a 4iiii power meter to unlock a complete picture of your performance, bridging the gap between watts and heart rate for unparalleled insights into your fitness gains.
Built to Endure Your Toughest Rides
Athletes need gear that keeps up with their ambition, and the Viiiiva delivers. With an IPX7 waterproof rating, it shrugs off rain, sweat, and even the occasional mud splash, ensuring reliability in any condition. The 540+ hour battery life, powered by a single CR2032 coin cell, means you can focus on your training, not on charging. Whether you’re logging winter miles or tackling multi-day events, the Viiiiva is engineered to last as long as you do.
Seamless Connectivity for Indoor and Outdoor Training
The Viiiiva speaks the language of your devices. Thanks to dual ANT+ and Bluetooth compatibility, it syncs effortlessly with your head unit, smartwatch, or favourite indoor training app, from Garmin to Zwift. No more switching monitors or losing data; the Viiiiva ensures your heart rate is always where you need it, whether you’re grinding up a mountain pass or spinning in your pain cave. For cyclists who train across platforms, this versatility is a game-changer.
Specifications
Chest Size: 66 - 132cm (26” - 52”)
Auto Power Down: 3 minutes
Transmission: ANT+ & Bluetooth®
Battery Type: CR2032 lithium-ion coin cell
Battery Life: 540+ hrs
Operating Temperature: 0 - 50°C (32 - 122°F)
Storage Temperature: -20 - 70°C (4 - 158°F)
Data Transmission Range: 3m (9.5’)
Waterproof Rating: IPX7
Heart Rate Range: 30 - 240 bpm (1 bpm resolution)
Input Sensitivity: 5% duty cycle
Frequency: 32.768KHz
Weight: < 46g (1.6oz)
Features
- Professional-grade heart rate accuracy for real-time physiological insights during high-intensity workouts, endurance rides, and virtual training
- 540+ hour battery life from a single CR2032 coin cell, minimising downtime and maintenance
- IPX7 waterproof rating, ensuring durability in rain, sweat, and harsh training conditions
- Dual ANT+ and Bluetooth connectivity, compatible with head units, smartwatches, and indoor training apps like Zwift and Garmin
- Seamless integration with 4iiii power meters to combine heart rate (bpm) and power (watts) data for a complete training efficiency analysis
- Optimised for training zone precision, helping cyclists fine-tune intensity, recovery, and performance gains
- Lightweight and comfortable design, built for athletes of all levels to wear during long rides without discomfort
- Versatile use for both indoor and outdoor training, ensuring consistent data across all cycling disciplines
Delivery & Returns
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