The Kinetic Wired Power Computer is designed to give you accurate power (watt) readings when you are using a Kinetic Trainer. All other functions (speed distance cadence etc) are accurate both on & off the trainer. Because of this the Kinetic Power Computer is an excellent choice for a cycling computer both on & off the trainer. The watts reading is calibrated based on a mathematical relationship between power & speed. This Kinetic Power Formula along with our proprietary software accurately estimates the cumulative effect of 16 different interactive forces. This power curve is based on the "average " rider on the "outdoor ride" using the following cubic function: P = (5.244820) * S + (0.01968) * S3. S=speed in miles per hour P=power in Watts IN THE BOX: Computer Stem / Handlebar Mount Speed Transmitter w/magnet Cadence Transmitter w/ Magnet Battery Cable Ties. Speed 4 Keys Auto Start Max. Speed Speed bar (% of max. speed) Average Speed Speed Comparison Distance 1 Distance 2ODO 1ODO2ODO 1+2 Ride time 1 Ride time 2 Distance Countdown Time to arrival (arrival time/time remain)% to arrival (Bar display)2nd Wheel size Time (12/24hr) Auto sleep Stopwatch Auto Lap (Time/ Distance) Power Max Power Avg Power Temperature (C/F) Max Temperature Min Temperature Easy Caibration Service interval reminder EL Backlight Cadence Average Cadence Max Cadence Low battery indication