The SK-1 sound system for trucks is a single easy to connect module pre programmed with a scale sounding truck engine sound that includes full start stop feature and horn,air brakes  and other sounds controlled from a spare proportional,or 3 way switch transmitter channel.It has a remote volume adjuster and a powerful up to 7w amplifier.

We recommend the 60 mm 4ohm full range speaker we stock as most Cross-rc kits all come with speaker box to suit this speaker although others will fit also.

NOTE..a Y lead servo connector or extension lead is required to share throttle to esc-sound module connection in some cases.