The switch has dual control and single control wall switch difference models, dual control each unit more than a single control terminal. A light in the room can be controlled outside the room can also be referred to as double control wall control switch manufacturers, dual-control switch can be a single control with wall switches, but not as a 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), with some parts of 118, 120 less. 3 wiring wall switch installation method: 1, quick-connect: upcoming stripped thread directly into the wiring hole that is able to complete the connection, do not use screws card to take power switch knives and other tools. The wiring inside the hole to have a spring, reverse pull out the card will be the primary, more convenient way to insert needed stitches office outlets poke holes or pressure plate can move stitches according to the line to pull out. 2, double plate pressure line: that is, through two small screws to tighten the metal sheet, so that the wire between the metal sheets to be stepped up. Double board pressure line connected to a single line at the good results, but if at the same time take two different diameter wires, it is not damaged wire wall switch price, it is easy to loose a fine. 3, screw press line: the terminal screws screwed into the lateral extrusion and wire making firm docking terminal. Screw press line mode wiring biggest advantage is that easy, reliable, is not easy trip. The disadvantage is that the screw will crush even the pressure off the wire, a long time may cause heat and even lead fire safety hazard. New wall switches, wall switch, provided by Tianyi Electric Appliance Co., Ltd. Hebei Tianyi. Hebei Tianyi Electric Co., Ltd. (www.tianyidq.com) strong, credible, in Xingtai wall switch industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Tianyi Electric into the brilliant and you work for a better future!