This is the TQi 2-Channel 2.4GHz Transmitter for the Traxxas DCB-M41 40" Twin Hull Catamaran. Receiver and Servos not Included.                                                                                                         FEATURES: 
Can be equipped with the Traxxas Link Wireless Module (TRAC6511) along with the iPhone, iPad or iPod touch* to create a graphical user interface for the vehicle                                      Adjustable steering and throttle percentage and sensitivity           Automatic model recognition recalls settings for up to 30 Traxxas Link enabled models                                                 Throttle neutral adjust                                               Menu and Set buttons                                                  Multi-Function knob can be programmed to control Steering Sensitivity, Throttle Sensitivity, Steering Percentage, Braking Percentage, or Throttle Trim                                                                                                                                       INCLUDES: Traxxas TQi 2-Channel 2.4GHz Transmitter                                                                                                              REQUIRES: AA Batteries: Four for transmitter                                                                                                                    COMMENTS: *Traxxas Link Wireless Module is not included and must be  purchased separately. iPhone, iPad and iPod touch are not included