I bought 2 Cateye V3s. Put the cadence/speed sensor on the left rear chainstay. You sync each computer and heartrate monitor individually to the one sensor by putting one computer in a different part of your house while you sync the first computer and do the same for the second computer. The wireless signal reaches from the sensor on the rear chain stay to the computers mounted on the stokers and captains handlebars and both heart rate monitors work with each individual computer. I have had this set up for 2 years without any problems. My wife's mileage is exactly the same as my mileage.