[Sound Control Design] Our el wire has a voice control function mode. There is a slidable switch on the side of the battery pack designed to adjust the sensitivity of the sound. [4 Modes] Constant light - Slow flash - Follow the sound rhythm flash - Off, One-click switching, flash mode 360 degrees of illumination. [Reduce noise] The neon wire lights applied upgraded battery pack so greatly decreace the noise which emits from the inverter.When you bring el wire to an event or party, it ensures a pleasant experience [EL Wire Specification] Wire length 9ft. Wire diameter 0.09in/2.3mm and powered by 2xAAA batteries (not Included).