Tracer System is a lightweight 4 unit In-Sync-System which includes no moving parts! This means less problems and headaches for the on the go Mobile DJ. This system is powered by 1 master unit and 3 slave units. Connect as many as 16 units. Compatable with any Eliminator Lighting in-Sync-System units. Main Features: 8 multi-colored lenses per unit, 16 sound activated patterns, Automatic flash chase pattern, Static/All On. 4 x 120v 300w Lamps EL-(64514).