If you are not impressed with the additional power you feel with the Velocity Performance Products Throttle Sensitivity Controller, within 30 days of purchase date you can return for a full refund from us. Simply contact us via online chat on our website and tell us the reason and give us the chance to troubleshoot any problems. If your still not satisfied we will issue you a return merchandise authorization (RMA) number. All you need to do is return the device (prepaid with tracking) and with proof of purchase from us, and RMA Number, undamaged in original packaging and we will issue a full refund for the purchase price.