... goods including GPS watch, heart rate monitor, stopwatch, bicycle computer, bike computor, Riding Bike Meter, altimeter, compass, blood ... , Blackberry, iPhone SpecificationMerchant SKU: RX002Standard 3.5mm headphone jack interface. Compatible with iphonePassthrough for headphones so you can ... heart rateRX does not have a battery, uses iPhone jack for powerDistance - RX will receive the signal up ...