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4iiii Viiiiva Heart Rate Monitor

Josh Matthew April 10, 2026

$99.99

The 4iiii Viiiiva Heart Rate Monitor combines durable construction with ANT+ and Bluetooth SMART technology

Only 1 left in stock – Ships today! (Wednesday)

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4iiii Viiiiva Heart Rate Monitor

The 4iiii Viiiiva Heart Rate Monitor delivers accurate heart rate data for training and everyday rides. It connects to devices using Bluetooth Smart and ANT+ for compatibility with cycling computers, watches and training apps. The soft chest strap provides a secure and comfortable fit during long workouts. A user-replaceable coin cell battery offers an incredible 540 hours of use, reducing the need for replacements. In addition, the Viiiiva is IPX7 sealed agains water, meaning even the worst weather won’t throw critical heart rate data off course. For a complete picture of your training and performance, this durable heart rate monitor is a great pick.

 

Product Details

Key Features of the 4iiii Viiiiva

  • Accurate: Delivers precise, real-time heart rate data to enhance your training.
  • Comfortable and Adjustable Strap: Designed for long-lasting comfort with a secure, adjustable fit.
  • Water-Resistant Design: The 4iiii Viiiiva Heart Rate Monitor is built to withstand sweat and light rain during workouts. IPX7 rated for durability against the elements
  • Long Battery Life: Provides extended usage of 540 hours without frequent battery replacements.
  • Dual ANT+ and Bluetooth capabilities: Works with your favorite device and 3rd party apps like Zwift, Peloton and more
  • Lightweight construction: Only weighs 1.6 oz.

Compatibility

This Heart Rate Monitor is compatible with fitness apps (e.g., Zwift) as well as Bluetooth-enabled devices (smartphones, GPS bike computers, etc.).

Advice From Our Staff

The PMC staff feels the 4iiii Viiiiva Heart Rate Monitor is best suited for cyclists and fitness enthusiasts who want accurate heart rate monitoring without the need for complex features. We believe it’s ideal for those who value comfort, simplicity, and reliable performance during training sessions.

Specs

  • Chest Size: 26" - 52" (66 - 132 cm)
  • Auto Power Down: 3 min
  • Communications Protocols: ANT+, Bluetooth SMART
  • Data Transmission Range: 3 m
  • Input Sensitivity: 5% duty cycle
  • Battery type: CR2032
  • Battery life: 540+ hours
  • Waterproof rating: IPX7
  • Weight: 46 grams
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