Traxxas 6550X Telemetry expander 2.0, TQi radio system

Traxxas 6550X - TQi Telemetry Expander 2.0 Features: Installs quickly and easily; no parts to replace or swap Waterproof case keeps the expander safe from the elements Six available ports for connecting auto-detectable plug and play sensors Includes: (1) Telemetry Expander 2.0 (1) Receiver data cable (optional data cables available) Specs Part number(s) included (in factory packaging): 6550X This is the TQi Telemetry Expander 2.0Features: Installs quickly and easily; no parts to replace or swap Waterproof case keeps the expander safe from the elements Six available ports for connecting auto-detectable plug and play sensorsIncludes: (1) Telemetry Expander 2.0 (1) Receiver data cable (optional data cables available)Requires: Plug-in GPS Speed Module (part 6551X, sold separately) TQi radio system with Wireless Module (TRA6511) TSM receiver (TRA6533) Apple device running iOS 4.3 or higher or Android-equipped device with Android 4.4 and higher Tthe Traxxas Link App (latest version availabl