Saris Speed / Cadence Sensor - Dual-Antenna / Bluetooth-Operated - RRP: £39.99 ,brand new still sealed(came with a Saris fluid trainer but is not required),with 30 days free Rouvy code. Turn your dumb trainer into a smart one by placing sensor on your rear hub( on wheel trainers only). Just like a garmin speed sensor. Any questions please ask.
