HydroWave Mini 12V Adapter Conversion Kit Allows your HydroWave Mini to perform for a longer period of time on a larger power supply than the standard 9 volt power supply. Warning [https://productimageserver.com/prop65/6pt.png]WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov [http://P65Warnings.ca.gov].