4iiii Viiiiva 2.0 Heart Rate Sensor

The 4iiii Viiiiva 2.0 is a precise heart rate sensor that helps athletes better understand their physical exertion and tailor their training. Whether during intense intervals, long runs, or virtual bike races – it provides real-time heart rate data to monitor training intensity and track long-term fitness progress.

Thanks to its rugged construction and long battery life, the Viiiiva is designed for regular use during training. It connects to numerous compatible sports watches, bike computers, and training apps via ANT+ and Bluetooth.

Highlights of the 4iiii Viiiiva 2.0 heart rate sensor

• Precise, real-time heart rate measurement
• Wireless transmission via ANT+ and Bluetooth Low Energy (BLE)
• Compatible with numerous bike computers, sports watches, and training apps
• Over 540 hours of battery life
• Replaceable CR2032 coin cell battery
• IPX7 water resistance against sweat and rain
• Lightweight design weighing less than 46 g (manufacturer information)
• Adjustable chest strap for a chest circumference of approximately 66 to 132 cm

The Ultimate Power Duo

When combined with a 4iiii power meter (not included), you can analyze external output in watts alongside your heart rate as your body's physical response. This allows the Viiiiva to provide a deeper insight into your training load, helping you target your training zones more effectively and better understand your fitness development.