I was bought a Garmin Forerunner 305 (which is fab) as a present. I was also bought this bike mount to enable me to mount the unit onto my bike. BE WARNED - this unit does NOT attach the Forerunner 305 unit to your bike. I read earlier feedback and Aaron (July 2010) says the same thing. Apparently, this unit attaches the CADENCE UNIT to your bike, not the 305 unit itself. The product does look well made however, but just beware - the description on the website is inaccurate/ misleading.