1. No should find out the place the switch is within the dark. Simply contact the lamp physique to show it on or off easily. 2. Using high-grade coils, it has the developments of high power factor, low temperature rise, no noise, and no flicker. 3. It makes use of the human body to trigger the internal chip to regulate soft changes. 4. Save the effort of locating the substitute at night. 5. Suitable for metal lamps, surface lamps, and bedside lamps. Model:1 skill contact leadership sensor Rated voltage:AC220 (V) Rated current:3 (A) Contact resistance:standard (ohm) Insulation resistance: ordinary (Mohm) Voltage:AC 220V +/- 10%, 50HZ Colour:Black Material:PVC Size:4 Package Contents: 1 * 1 channel sensor exchange Only the above kit content, varied item should not included. Note: Light mirrored image and assorted reveals may cause the color of the object within the photograph a chunk different from the genuine thing. The size allowed error is +/- 1-3cm.