The switch has dual control and single control difference 118 type wall switch, dual control each unit more than a single control terminal. A light in the room can be controlled outside the room can also be controlled called dual control, dual-control switch can be used when single control, but not for single control switch dual control. 1, classified according to the switch to start the switch to points mode: pull switch, rotary switch, pull down the switch, button switch, rocker switch touch switch, reset switch, tap switches 2, commonly switch connection classification according to press the switch. Connection to the point: single control switch, dual-control switch, bipolar (dual) dual-control switch. 3. Press the Size by Size Score: 86, 118 type, 120 geographical distribution: Most domestic use 86 switch (80% of the area), some parts of the wall switch 118 model, with a very 120 less. Wall switch socket inextricably linked with our lives, places where power would be useful to wall switches and sockets, let's take a look at classified household switches and sockets it: ordinary switch: a single open, double open, three open and so on. Dual-control switch: 2 switches can be controlled in a different location in the same light. Luminous switch: with the switch fluorescent lights or dim light for night to find a location. Dimmer switch: switch can pass knob to regulate light intensity. 10A: meet the family of ordinary electrical power limit. 16A: meet the family air-conditioning or other electrical power. Socket with switch: control through power socket; can make separate switch. Blank panel: check box on the wall to seal shield aside, or abandon the wall hole use. Cassette: installed in the walls, traces to be embedded before. Information outlets: refers to telephone, computer, TV socket. Note: First, telephone, cable socket on the back of the module is a unified standard. Second, the kitchen outlet to consider the actual use. Third, all electrical wall, if you want to install, if you do not install the whiteboard, which is for the future to leave a manhole. Fourth, we must consider the location of a desk study and the network cable when wiring. _ Sky electrical wall switch (Online) _ Wall Switch by Hebei Tianyi Electric Co. Hebei Tianyi Electric Co., Ltd. (www.tianyidq.com) Hebei Xingtai, wall switch leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Tianyi Electric leadership with the staff warmly welcome all inquiries negotiations to create a better future Tianyi Electric.