Being 10-times more sensitive than most heart rate monitors, and 5-times more responsive, the 4iiii Viiiiva is one of the most advanced heart rate monitors on the market. With advanced beat-to-beat data, the Viiiiva measures variabilities within your heart rate so you can reliably and consistently track even slight surges on the go. Thanks to the activity logging software, this unit saves up to 65 hours of riding data, which can be transferred to other devices and apps to help track your long-term performance.
Pairing this unit with other compatible devices is a breeze. As the 4iiii Viiiiva is compatible with ANT+ and Bluetooth devices, you can easily pair this heart rate monitor with your existing power meter, cadence sensor and bike computer. Pairing your smartphone is even easier. Simply tap your phone and Viiiiva together, and the devices will pair immediately. It’s even compatible with cardio-equipment in the gym. With an easily replaceable coin cell battery, the unit offers up to 200 hours of use on a full battery.
- Advanced, beat-to-beat measurement makes Viiiiva ten times more sensitive than most heart rate monitors to capture the most sensitive of heart rates, measure heart rate variability, and gauge your level of activity readiness
- Activity logging means you can not only view your data in real time, but you can also save up to 65 hours of data on Viiiiva and transfer it to another device or application
- ANT+ sensor bridge lets Viiiiva collect data from other ANT+ sensors, then transfer it via Bluetooth to your iOS or Android smartphone
- Tap-to-pair connection lets you simply tap your iOS or Android smartphone to your Viiiiva pod to immediately connect the devices
- Fitness equipment pairing enables you to pair Viiiiva with cardio equipment in the gym for real-time and logged data
- 4iiii product integration means you can use Viiiiva with PRECISION and Sportiiii coaching tools to give you a full range of training data
- Weight: 5 g (1.76 oz)
- Dimensions: 6.5 cm x 4.5 cm (2.55 in. x 1.77 in.)
- Strap length: 57–132 cm (23–52 in.)
- Battery type: CR 2032
- Up to 200 hours of battery life
- Operating temperature: 0–50 C (32–122 F)
- Waterproof rating: IP 67
- Radio frequency: 2.4 GHz
- ANT+ and Bluetooth compatible
How long will it take to arrive?
Please check the stock availability notice on your item when placing your order. This item is: In stock
Express Delivery Available If ordered before 8pm, delivered by courier next working day. Available on orders placed before 8pm (2pm weekends and Bank Holidays) for delivery next business day. Applies to most delivery addresses within mainland UK.
How will I know it has been sent?
You will receive an email to confirm when your item has been sent.
You can also check the status of your order and individual items by accessing My Account details and following the prompts.
Please allow 10 working days from dispatch of your order before notifying us of any late deliveries.
It may be advisable to check with your neighbours to see if a parcel has been left with them, check any outhouses you might have where it may be left if it cannot fit through your letterbox and contact your local sorting office to see if the item has been returned to the depot as undelivered and awaiting collection.
If I'm not completely happy with my item?
Please see our returns policy.
Top Customer Reviews
Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.
Very good HRM. Stable reliable readings at least while it is new.
I have been using heart rate monitors to train for the last 40 years. I read a lot of great things about this one and decided to give it a go. First time out it worked fine. Failed miserably second and third times out. Half way through my ride the monitor started giving me impossibly low heart rates. I will be going back to my old monitor. Could not possibly recommend this one.
I Received my HR monitor in typical PBK fashion to the Middle East in 4 days roughly. Great price, fast shipping and I can finally use my HR monitor with Zwift and ANT+. Highly recommended
great product. very easy to pair with both ANT and Bluetooth. I m using it with Zwift so I can t comment on the 4iiii app.
Only heart rate monitor you will need
This is a fantastic device. Now with the 4iiii Viiiiva I can use the one heart rate monitor for all my needs. All my ANT+ sensors are now easily available to my iOS devices. Makes using Zwift iOS and my other training apps on my phone easy. It is well made and I like the strap too. Very happy with my purchase and the support staff at ProBikeKit we helpful prepurchase. Highly recommended.