This is the The Dig Independent Control from Novak for Rock Crawlers with Dual Electronic Speed Controls. FEATURES: Allows independent control of front, rear or both speed controls in crawlers with dual speed controls Provides tighter turns, precise maneuverability and more control on steep inclines No vehicle modifications required, simply plug into any 3-channel surface receiver (transmitter does not need to have a mixing function) Compatible with any two sensored or non-sensored brushless or brushed systems and even one brushless and one brushed system Adjustable brake bias front and rear One-Touch Set-Up Two external indicator LEDs can be mounted on outside of vehicle"s body to indicate which dig is engaged Compatible with crawler rigs with independently controlled steering for effortless navigation INCLUDES: The Dig Independent Rock Crawler Control with JST receiver plugs, two external LEDs, two zip ties, double sided tape and instructions REQUIRES: Connecting to receiver and mounting Dig unit in vehicle SPECS: Input Voltage: 4-12V Power Consumption: 10 mA Output Current (handling): 5 amps Weight: 0.12 oz (3.50 g) Size: 1.53 x 0.63 x 0.49" (39.0 x 16.5 x 12.5mm) LEDs: 2 on-board, 2 external COMMENTS: The Traxxas (TQ-3) Transmitter must be modified with a three-position auxiliary switch to operate with The Dig. jxs 7/28/09 ir/jxs