This ANTand USB stick receives activity data if the compatible fitness device is within range. It is suitable for Garmin products and cycling games, must-have for cycling enthusiasts! Features: 2.4GHz ANTand wireless communications protocol up to 8 channels. Receive ANTand wireless radio and translate it into USB protocol for computer software. Plug into the USB port of a computer and search for the cycling software, easy to use. Suitable for Garmin, for Zwift, for Wahoo, for Bkool. Mini size and light weight, very convenient to carry. Specifications: Transmission Range: 5 meters (best performance within 3 meters) Size: 1.9 x 1.5cm or 0.7 x 0.6in Weight: 1g or 0.03oz Package List: 1 x ANTand USB Stick Adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.