Transform your phone into an advanced cycling computer with Bluetooth 1° precision sensor. Measure your spot speed, distance, acceleration, cadence, grade, heart rate and power.The innovative 1° precision bluetooth smart sensor measures distance with unmatched 1cm ( 3/8" ) precision. The sensor calculates spot speed, instant acceleration, cadence and surface grade. This precise data is wirelessly transmitted to a mobile application, which ultimately calculates the propulsion power. The cyclist is informed about its performance data visually and audibly within less than a second. All performance data is recorded in a CSV file and can be uploaded to VeloComputer.com for storage, shared with your friends and analyzed in a spreadsheet.VeloComputer works with VeloCoachhttps://market.android.com/details?id=com.somo.servergui&feature=search_result#?t=W251bGwsMSwyLDEsImNvbS5zb21vLnNlcnZlcmd1aSJd