This is the Traxxas DTS-1 Drag Timing System.

FEATURES: Turns any stretch of smooth asphalt into a personal RC car dragstrip
          Compatible with the Traxxas Link app and TQi Docking Base (not
            included, sold separately)
          Laser precise dual-beam staging and speed trap
          Race up to 330ft (quarter scale 1/4 mile)
          Pro and Sportsman trees
          Stage and pre-stage beams
          Dual beam finish line
          Testing and race modes
          Winner indicator
          Foul indicator
          Practice tree
          High Intensity LEDs
          WiFi connectivity (optional plug-in WiFi module required)

INCLUDES: DTS Staging Tree with Laser Pre-Stage, Stage and Finish Line Beams
          Finish Line Console with Safety Ramp
          Six Laser Reflectors
          Instruction Manual

REQUIRES: AA Batteries: Eight

COMMENTS: TQi and Traxxas Link (not included) adds Reaction Time, Elapsed
            Time, Trap Speed, Bracket Racing Dial-In, and Event Moderator
            features.

                                                                   jxs 06/29/12
                                                                         ir/jxs