4iiii Viiiiva Heart Rate Monitor
Trusted by pros and enthusiasts alike. Viiiiva is 10x more sensitive than most heart rate monitors, 5x more responsive, uses advanced beat-to-beat measurement and can store up to 65 hours of data. The sensor also collects and transfers data from your other ANT+ products via Bluetooth to your iOS or Android device.
Viiiiva is comfortable and easy to wear, featuring a soft, flexible strap for a perfect fit.
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
Long battery life Viiiiva comes with an easily replaceable battery that provides up to 200 hours of usage
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
Battery life (hours of use): up to 200 hours
Operating temperature: 0–50 C (32–122 F)
Waterproof rating: IP 67
Radio frequency: 2.4 GHz
Communications Protocols: ANT+, Bluetooth Smart