... DescriptionFlow:0-15 lphPressure: 0-10BarPower:28W, 220V, 50/60Hz,Drive System: two phase motorProtection Degree: IP55Flow Control: Manual operationMaterialPump head: SUS304 ... %,LED display the normal frequency(at running or stop)2.Drive by electromagnetism,simple design,the speed of stroke is adjustable ...