This is the Tamiya Tractor Truck Multi-Function Control Unit with integrated Electronic Speed Control. For use on Tamiya 1/14 scale R/C tractor trucks and the #56307 Mercedes 1850L delivery truck. FEATURES: Twenty four radio-controlled sounds including, alarms, engine starting idling and revving, coupler attachment, air brake and more Nine different types of lights and vibration synchronized with engine sounds including, head and tail lights, turn signals, speed indicators, fog, roof, hazard, auxilliary, and back-up lights Special Operations add five extra features including, engine stop/ start switching, horn/support leg switching, light on/off switching turn signal/hazard lamp switching, and running/revving switching 2-3/8" (60mm) diameter speaker emits authentic sounds Electronic speed control enables low speed running for semi coupling Coupler unit controls sound for loading and unloading of trailer, speed control raises power during towing mode Control unit for volume and light adjustment Vibration unit uses specialized vibration motor with two types of counterweights INCLUDES: One Tamiya Tractor Truck Multi-Function Control Unit with speaker, pre-wired lights, vibration, coupler, control units, electronic speed control and instructions REQUIRES: Tamiya tractor trailer using four channel stick radio, two channel pistol grip radio with steering wheel will not operate unit. COMMENTS: Designed to be used with four channel stick control radios with self- neutral system such as those from Futaba, JR, or ACOMS. Different brands of radios may not operate unit at maximum efficiency. The Tamiya Multi Function Control Unit provides many jxs10/02/03 different truck related sound effects. It REQUIRES ir/jxs an FM type radio only with analog trim such as updt jxs4/19/05 the Futaba 4YF, FUTJ4061 - FUTJ4090. UPGX2/25/13 jxs 10/02/03 ir/jxs updt jxs 4/19/05