This Meccano tuning RC sound system allows you to build one of the three models and connect your MP3 player with the special cable included in the pack. These high quality speakers also feature 2 pre-recorded music styles - rock and hip-hop. Sound effects include screeching tyres and roaring engine. Along with many tuning accessories, this set includes stickers, back fin and chrome rims. An assembly instruction booklet and tools are included along with the 345 parts.