Composite fireworks are a combination of pyrotechnic battery fireworks, so-called compact batteries ("compacts"), which are attached to a fixed base and connected by a special timing detonator. Composite fireworks are characterized by a large variety of pyrotechnic effects and a long burning time. No complicated wiring etc. you just light the fuse and watch. The fascination for unconventional combinations of light, sound and smoke in fireworks is something unusual, and people are often fascinated by things they don't experience every day, and fireworks offer just that.