Magnetic bike computer with five function . Exercise bike flywheel 2.5kgs. TUV-GS,CE,ROHS certificate; Magnetic bike TX-B917EMagnetic bike computer with five function scan ,speed ,time,distance ,caloriesExercise bike flywheel 2.5kgs8 levels of magnetic resistanceOutside magnetic systemGS CE ROHS approvalMagnetic bike size :70x43x113cm Magnetic Bike