The Touch Switch XD-621 Red and black wire connect AC 220V output; the other black and blue line connect lamp. Note: before installation,please cut off the main power. to set a touch point on the mirror, the diameter of the touch point should be 9-10mm. first of all, should remove the quicksilver of mirror around the touch point,the size for the removable quicksilver should be 1.5-2mm. to make a reticle in the middle of the touch point,there are three arrow lines on cover of the switch, when install,the three arrow lines should aline any three lines of the reticle, it can touch to control if after aline the direction, right now remove the paster of the touch board,and then can install the touch switch on the mirror, after that you can fix it using other stuff in order to avoid from dropping. Touch sensor switch, applicable to all types of lamps on the medium(such as glass, acrylic, plastic , ceramic, etc. Features : Voltage: 170 to 240V AC 50 or 60Hz Power : 500W Wires Connection: Red and black wire connects AC 220V output; the other black and blue line connect lamp. Package Includes: 1 x Touch Switch XD-621
