Review on Cycplus Waterproof Heart Rate Monitor Armband - Men and Women, Bluetooth/ANT+ Compatible by Austin Olson

Good price! I bought a cycplus m1 bike computer that has enough space for sensors. like that . Decided to fill the sensors! I bought a cadence sensor and a heart rate sensor. (Both cycplus, I thought there might be better compatibility and they are very reasonably priced). Instantly connects to both my phone via Bluetooth and my bike computer via ant+. The reach can be an inch or two longer - if you want to carry it on your shoulder it won't (easily) work if you have large diameter hands :). This is a light sensor similar to that found in a typical smart/sports watch. They're notoriously less accurate than chest straps that use electrical pulses or whatever, but I've found them to be fairly accurate so far.