1. One Year Warranty is committed to providing you with high quality products and a good after-s experience. Our products come with a one-year warranty, so please feel to us when there is a problem with the product or if you have any questions, and we will answer your questions as soon as pible. 2. Attention APP currently does not support recording indoor cycling activities. If there is a need for indoor cycling, you can use it with other outdoor cycling apps. Please watch the tutorial video of the VORTEX before use. 3. Speed & Cadence Dual Mode VORTEX Cycling sensor has two modes: Speed/Cadence Mode. Connects Through ANT+/Bluetooth, You can fast switch mode via APP anytime you want. VORTEX also compatible with other devices, you can consult us for details. To get both speed and cadence data, you need to install two sensors. Only one mode is available at the same time. 4. Accurate Data & APP SupportThrough VORTEX speed and cadence sensor, your cycling data is more accurate than GPS. Real cadence in real-time to pace your cycling on bike computer and App. Measure range: Cadence max 250RPM/Speed max 85KM/H. 5. Design&One BatteryThe shell of the VORTEX bike sensor uses a spiral trapezoid shape which not only fits better to the surface of the crank and hub but also conforms better to the principles of aerodynamic design and The sense of speed of riding.With one battery, Vortex can last longer.