RF LED dimmer,supply voltage:DC5V, 12V ,18V, 24V < optional > ( supply voltage should be marked on order ) RF ... ,its control mode is wireless control, you couldadjust light to the appropriate lighting brightness in accordance with your actual need ... .Technical parametersworking temperature: -20-60 °Csupply voltage: DC5V, 12V ,18V, 24V < optional > ( supply voltage should be marked on order ) ...