The CatEye SPD-30 Magnetless Speed Sensor offers dual band Bluetooth® and ANT connectivity for a quick and easy pairing with the CatEye Cycling app. With IPX7 waterproofing, this sensor attaches to any front or rear hub with the included rubber strap and provides a reliable speed and cadence reading without the need for magnets. Perfect for use with the CatEye Padrone Digital, Padrone Smart , Padrone Smart, Strada Smart, and more.