The chest transmitter is lightweight, comfortable, coded without interference, Polar quality, in short! Coding is nickel: no interference under power lines or near motors cars or motorbikes on, nor other heart rate monitors that roll with you bike / ATV: Polar is renowned for! I kept 6 years for intensive use NO, which is very long, but of course it will last much shorter for a very sustained use (in this case count 2 or 3 years maximum). In the end, the strap was well tightened but relaxed, she still played his part well! Good product with good price from Amazon, always with customer satisfaction at the appointment!
