Traxxas 6511 TQi Link Wireless Module Traxxas Link Wireless Module plugs into your wireless-ready TQi transmitter Combines with the Traxxas Link app to deliver an intuitive, high-definition, full-color graphical user interface on your mobile device Uses Bluetooth low energy to connect to Android 4.4 and up or Apple iOS 4.3 and later platforms Quick and easy installation, installs in minutes Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles