The heart rate monitor of choice for top cycling teams like Israel Start-Up Nation, Viiiiva is so much more than your standard Heart Rate Monitor. It stores up to 65 hours of workout data so you can be sure that your valuable data is never lost during a key training session.

Viiiiva can act as a ANT+-to-Bluetooth bridge to connect your ANT+ devices to a Bluetooth-only receiver such as a smartphone, tablet, or laptop. Viiiiva lets you connect your ANT+ device with your favourite training software such as Zwift, TrainerRoad, Wahoo SYSTM, Rouvy, and more.

It's Easy
Tap-to-pair connection lets you simply tap your iOS or Android smartphone to your Viiiiva pod to immediately connect the devices.
Display compatibility gives you the freedom to use your choice of ANT+ and Bluetooth compatible displays with Viiiiva.
The 4iiii app enables you to see your activity in real time, access upgrades through our web store, and transmit your activity data to other training apps or websites.
It's Advanced
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.
Fitness equipment pairing enables you to pair Viiiiva with cardio equipment in the gym for real-time and logged data.
Measurement Type
Operating Temperature
0 to 50°C (32-122°F)
Storage Temperature
-20 to 60°C (4-140°F)
Battery Type
CR2032 lithium ion coin cell
Battery Life
Waterproof Rating
Radio Frequency
57 to 132cm (23-52in)
65mm (2.6in)
37.4mm (1.5in)
11.2mm (0.4in)
Module Weight
Pod: 14g (0.5oz), Strap: 33g (1.2oz), Total: 47g (1.7oz)
Communication Protocols
ANT+, Bluetooth®
Activity save duration
Up to 60hr
R-R Interval Unit
1/1024 sec