I just happen to prefer wireless. My favorite right now is the Nightrider Rebel 5.0 or 8.0. THe HR monitor is built into the 8.0. They take at leat two batteries like the 2032 but you can mount the sending unit on the back whee lif you want. I dont get much cross interferance with the nightrider. A battery last maybe 6 months a year. The sending unit seems to last twice as long as the receiving unit.