The Viiiiva heart rate monitor by 4iiii excels in comfort and precision, boasting the ability to serve as a bridge between multiple ANT+ sensors and Bluetooth devices. Its advanced Beat-To-Beat system ensures exceptional sensitivity, making it ideal for cyclists. With up to 65 hours of data storage, compatibility with gym equipment, and useful training tools, it’s a versatile choice for activities like Zwift sessions and beyond. Plus, its long-lasting battery ensures extended use.

4iiii Viiiiva heart rate monitors use both the ANT+ PWR and Bluetooth Smart Cycling Power Service standards, which makes them compatible with nearly every headunit, smartphone, or computer you wish to connect to. Check your recording device documentation for ANT+ PWR or Bluetooth Smart (also called BLE, BTLE, or BT4.0) Cycling Power Service capability.

• Continuous, accurate rate monitoring
• Automatically sends data to wearables + training apps
• ANT+ and Bluetooth compatible for easy pairing
• ANT+ to Bluetooth bridge functionality
• Stand-alone 60hr data back-up
• IPX7 Waterproof rating can handle the toughest conditions