4iiii - Viiiiva Heart Rate Monitor

4iiii - Viiiiva HEART RATE MONITOR

Take Your Training To Heart:
The 4iiii Viiiiva is a precision instrument designed to capture the most accurate picture of your internal physiological effort. Whether you’re pushing through a high-intensity workout, pacing a marathon, or climbing the virtual mountains of Zwift, the Viiiiva provides the real-time data needed to optimize performance, track cardiovascular fi tness, and manage recovery with professional-grade accuracy. Built for athletes of all abilities, the Viiiiva is engineered for comfort and extreme durability. With 540+ hours of battery life and an IPX7 waterproof rating, it is built to withstand the elements and your highest-intensity efforts. The Viiiiva is a reliable cornerstone of your training toolkit, providing the pulse of your performance every time you move.

How Does It Work?:
The Viiiiva utilizes a high-sensitivity chest strap to capture your heart’s electrical activity with medical-grade precision. This data is instantly transmitted via ANT+ and Bluetooth® to your head unit or indoor training app, providing a real-time window into your internal physiological stress. By syncing your heart rate with your performance metrics, you can accurately track fi tness gains, optimize recovery, and ensure every workout is performed at the right intensity.
 

PRODUCT FEATURES:

• 540+ HOUR BATTERY LIFE - With over 540 hours of life from a single CR2032 coin cell, you won’t have to worry about frequent battery changes for your Viiiiva.
• ANT+ & BLUETOOTH - Get the same numbers training inside and outside. The Viiiiva is both ANT+ and BLE compatible so you can use it on your preferred head unit and favorite indoor training app.
• WATER RESISTANCE - Engineered for durability, our IPX7 water-resistance rating ensures your heart rate monitor keeps pace with you, handling your most grueling training days without missing a beat.

Specifications:

• Chest Size Fits chest size from 66-132cm (26-52”)
• Auto Power Down 3 minutes without valid heart rate signal
• Transmission ANT+, Bluetooth
• Battery Type CR2032 Coin Cell
• Battery Life 540+ hours
• Operating Temperature 0 to 50°C (32 to 122°F)
• Storage Temperature -20 to 70°C (4 to 158°F)
• Data Transmission Range 3 meters (9.5’) (Typical)
• Waterproof Resistance Level 10 meters (IPX7)
• Heart Rate Range 30 to 240 BPM in 1 BPM resolution
• Input Sensitivity 5% duty cycle
• Frequency 32.768 KHz
• Weight <46g (including battery)