1、Finding the light switch in the dark house is difficult, but if you have this intelligent sound & light controlled switch, you just make some sound such as footsteps and claps (Up to 65 decibels) and the light will turn on itself automatically. 2、Light will stay on for about 50 seconds after the switch detects the sound. 3、Great switch for use around bathroom,hallways, staircases and porches. 4、It is compatible with incandescent lamp, energy saving lamp and led lamp. 5、With two-wire channel, easy to install. Features:  Finding the light switch in the dark house is difficult, but if you have this intelligent sound & light controlled switch, you just make some sound such as footsteps and claps (Up to 65 decibels) and the light will turn on itself automatically. Light will stay on for about 50 seconds after the switch detects the sound. Great switch for use around bathroom,hallways, staircases and porches. It is compatible with incandescent lamp, energy saving lamp and led lamp. With two-wire channel, easy to install. Specification:  Voltage: 250V Material: PC Color: Shown As Pictures Size: Approx. 86 * 86mm / 3.38 * 3.38inch Weight: 85g Type: Switch Package List: 1 * Switch 2 * Screws Note: It should be used with match bottom case, or it won't work.