They re an up and coming manufacturer of bike powermeters and heart rate monitors.
Bicycle heart rate monitor.
Heart rate monitors have been around for decades.
4iiii claimed that it s 10x more sensitive when compared to traditional heart rate monitors such as the ones from wahoo or garmin.
The viiiiva heart rate monitor is targeted for more advanced users or the data geeks.
Polar introduced the first wireless wearable heart rate monitor the sport tester pe2000 in 1978 but it wasn t until 1982 when polar.
A heart rate monitor as the name suggests measures your heart rate in beats per minute and displays it on a screen.
Like garmin s premium heart rate monitor the unit takes cr2032 batteries.
As you ve no doubt noticed the harder you ride the faster your heart beats so heart rate is a useful proxy for your effort level.