The item is sensor desk lamp 3 way sensor , which have low, medium, high and off functions, suitable for 3-way touch lamp, you can use it to replace the old or damaged . The best repair for you. Features Note: random - Brand: Rosenice. - Material: Plastic and copper wire. - Size: 15.00X3.40X1.00cm/5.89X1.34X0.39in. - : / ; 50Hz/60Hz. - 3 levels: low, medium, high, then off. - Suitable for 3-way touch lamp (ordinary light bulbs 60W or less). - Red wire connecte to input (plug) wire; Black wire as a common Null wire (connect input and output Null lines respectively); White wire connecte to the output wire of the light source (ie bulb); Yellow wire must connect to the metal part of the lamp - After installing the touch device, dimming or can not allowed on power cord - No need to find where the is in darkness, touch the , you can easily on or off and adjust the brightness - Fit for general light bulbs, not fit for LED bulb or energy saving lamps, pls make sure this point before purchase Package list: 1 x Rosenice 3-way Sensor