FUNCTION: Receive ANT+ wireless radio and translate it into USB protocol to combine the traditional bike trainer with the cycling software. It is for Windows, but not Android or iphone COLLECT SENSOR DATA: Cadence, Speed, Heart rate, Power,etc. Compatible with Zwift, TheSufferfest, TrainerRoad, Rouvy Long disdense is supported: the product includes a three meters USB extension cable. It is very convenient when your bike is away from your computer. You don't need to buy the cable additionally