Indoor gradient simulator is designed to work exclusively with the Wahoo Kickr Smart Trainers and brings physical grade changes to indoor cyclingWhen paired with Third Party Apps and devices, Kickr Climb blends ascents and descents with resistance changes for a truly immersive indoor training experienceReal-time grade changes, up to 20% incline and -10% declineApp controlled or manual control with tethered remoteTrainer AccessoryWahoo KickrUPC/EAN/GTIN: 853988006416