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.
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.
Learn more about ANT+ & Bluetooth Smart.
Specification Value 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 57 - 132cm (23 - 52in) Length 65mm (2.6in) Width 37.4mm (1.5in) Depth 11.2mm (0.4in) 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 1/1024s
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.
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This monitor works quickly and every time reliable. Accurate at a fair price.
Superb device. fully compatible with Garmin Edge 530 thru Ant+ and simultaneous data transmission to your phone or USB Ant+ on pc/laptop with zwift.
Purchased originally for the ANT+ bridge feature for indoor training. It’s been so awesome.
It’s now become my strap for all activities. Very comfortable. Easy on/off.
No dropouts or weird data. Much more reliable than Garmin or Wahoo straps.
After having other heart rate monitors over the years that were either uncomfortable or full of tech issues, the 4iiii Viiiiva has been awesome. Paired easily out of the box and never drops or has blips. Perfect companion for Zwift racing and running metrics. Band is comfortable and soft as well.
I had given up on unreliable HR straps several years ago- so when I needed a new HR monitor, a teammate recommend this one. This is by far the best chest strap I’ve ever used, and I can count on getting reliable, consistent data every training session and race. Great product!!