Placeholder 4iiii Viiiiva Heart Rate Monitor — North Sports Skip to content

4iiii Viiiiva Heart Rate Monitor

Original price £54.00 - Original price £54.00
Original price
£54.00 - £54.00
Current price £54.00

In Stock | Estimated 3-5 Days Delivery

3D Secure Payments

Credit/Debit Card, Apple Pay, Google Pay, Paypal* or Klarna*

100% Genuine Product

North Sports are an Authorised Retailer for Leading Brands

The 4iiii Viiiiva Heart Rate Monitor is your ultimate training companion, whether you're a seasoned pro or a dedicated fitness enthusiast. Engineered with precision power meter technology, it delivers industry-leading accuracy, ensuring highly dependable cadence data for optimal performance tracking.

Designed to be durable yet lightweight, this heart rate monitor is compatible with ANT+ and Bluetooth head units, offering seamless integration with your existing fitness gear. With 3D power meter technology, it measures tri-axial strain on your crank arm, providing accurate and consistent data to help you train smarter. With a battery life of over 100 riding hours on a 2032 coin cell battery, you can trust that it'll keep up with your training demands.

This innovative device features a battery status indicator via the 4iiii app, ensuring you're always aware of its power status. Whether you're cycling indoors or hitting the trails, the lightweight and compact design of the Viiiiva Heart Rate Monitor ensures comfort and convenience during every workout session.

Key Features:

  • Heart rate monitor
  • Compatible with ANT+ and Bluetooth head units
  • 100 riding hours
  • 2032 coin cell battery
  • 4iiii app available
  • Measurement Type: ECG-Electrocardiogram
  • Operating Temperature: 0 - 50°C (32 - 122°F)
  • Storage Temperature: -20 - 60°C (4 - 140°F)
  • Battery Type: CR2032 lithium ion coin cell
  • Battery Life: 160hrs
  • Waterproof Rating: IPx7
  • Radio Frequency: 2.4GHz
  • Strap Length: 57 - 132cm (23 - 52in)
  • Length: 65mm (2.6in)
  • Width: 37.4mm (1.5in)
  • Depth: 11.2mm (0.4in)
  • Weight:
  • Communication Protocols: ANT+, Bluetooth®
  • Activity Save Duration: Up to 60hr
  • R-R Interval Unit: 1/1024s


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.

Tip: A 4iiii Viiiiva can be used to record your workouts along with your heart rate.

Welcome to North Sports! We are delighted to offer free UK delivery for orders over £50.

When an order has been placed, the tracking information will be sent to you, if available, at the earliest.

Delivery Courier Services

Your delivery will usually be carried out through the distributor's own courier service. This is to help speed up deliveries for our customers.

Deliveries are Monday-Friday and the courier might be able to deliver on Saturday's for an additional cost.

Our ordering team will always request the courier contacts you on the day of delivery to advise they're on route but please note the driver contacting you is not guaranteed and we only request that this happens.

Pre-Assembled Ready To Ride Delivery

Throughout the website there are selected products with the product option to have pre-assembly, some might be for an additional cost.

Next Day Delivery

Next Day delivery is subject to availability. Please contact us prior via email for us to confirm if this option is available.


If you've changed your mind about keeping your purchase please email, within 14 days from receipt of delivery ensuring you quote your order number. Want to know more? Please visit our full returns page here.

Precision Power Meter Technology: The 4iiii Viiiiva Heart Rate Monitor features advanced 3D power meter technology, providing accurate and consistent data by measuring tri-axial strain on your crank arm. This ensures industry-leading accuracy, making it the ideal choice for both professional athletes and dedicated fitness enthusiasts.

Seamless Compatibility: Compatible with ANT+ and Bluetooth Smart head units, smartphones, and other 4iiii products, the Viiiiva Heart Rate Monitor seamlessly integrates with your existing fitness gear. This allows you to track your performance with ease and convenience, whether you're cycling indoors, hitting the trails, or training on the road.

User-Friendly Design and App: With a user-friendly app and configurable rider compensation scale factor, setup and maintenance are simplified. The battery status indicator via the 4iiii app ensures you're always aware of the device's power status, while its lightweight and compact design offers comfort and convenience during every workout session.