... ,Operation suitable for family use .3,Environmental protection :just use tap water.4,Stable PCB deign for safty use and enhance product's life.5 ... design 9,3 minutes automatic shut-off10,Specially use for promotion project. Specification:(family use ultrasonic cleaner)Volume600mlUltrasonic frequency40KHzUltrasonic power35WPower supplyAC100-120V,60Hz ...