I’ve a HRM chest band that will transmit on both Bluetooth and ANT+. Is it possible to pair something like this with two head units, one using BT and one ANT+?
My main recording unit would be a Garmin Oregon on which I wish to preserve battery life so unless I need to look at the mapping the screen is powered off. So to see my HR whilst riding I’d need another device, can be cheap but does need to have decent battery life (in the order of 16hrs). Obviously if the HRM can’t connect to two devices then there’s little point in searching for the second unit.
I think it depends on the Bluetooth spec used. Most current BT HRM are, like headphones use to be, but it doesn’t need to stay that way. I believe the Garmin Duo already is.