CAT EYE Magnetless Cadence Sensor CDC-30

Size: 34.4 x 38 x 11.3 mm Weight: Approx. 10.3g (main unit only) Battery used: Lithium battery CR2032 x 1 Battery life: Approximately 300 hours Note: When installing on the inside of the crank, make sure the gap between the chainstay and the crank is at least 12 mm.