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4iiii Viiiiva Heart Rate Monitor

Josh Matthew January 3, 2022


The 4iiii Viiiiva Heart Rate Monitor combines best in class accuracy with ANT+ and Bluetooth SMART technology

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4iiii Viiiiva Heart Rate Monitor

The 4iiii Viiiiva Heart Rate Monitor isn’t just another heart rate monitor. To start with, using uses advanced beat-to-beat measurement, it’s 10x more sensitive than other heart rate monitors and 5x more responsive. In addition, it’s both ANT+ as well as Bluetooth SMART compatible, so it can connect to any ANT+ bicycle computer or a smart phone or tablet using Bluetooth.

But it gets even better…the 4iiii Viiiiva can also collect ANT+ data from devices such as cadence sensors, footpods and power meters, and transfer that via Bluetooth to your smart phone or tablet.

The 4iiii Heart Rate Monitor can store up to 65 hours of data.


  • Communications Protocols: ANT+, Bluetooth SMART
  • Weight: 5 grams
  • Dimensions: 2.6 in. x 1.8 in.
  • Strap length: 23-52 in.
  • Battery type: CR 2032
  • Battery life: up to 200 hours
  • Waterproof rating: IP 67

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