Therefore, to a transmitter control multiple receivers, you need to use this transmitter to each receiver for the job of the code. After all of the code stored in the receiver have the same address code, it can be launched simultaneously with a control. A receiver can simultaneously receive multiple transmitter signal? As the transmitter address code is fixed, the receiver can only store about address code. There are multiple transmitters, the receiver can only store one transmitter and the receiver's address code. Therefore, a receiver can not be controlled by multiple transmitters. The paragraph will state the difference between technology and RF technology ofGreen laser pointer. With battery power, the transmitter control distance change? Laser range distance will be shortened it? Brightness becomes weak it? This product uses the power according to different techniques and different. With internal voltage regulator chip, with the battery power consumption, battery voltage regulator chip supply voltage and current are reduced. As long as the battery output voltage greater than 0.9V, regulator chip can work. Regulator chip to work, the control distance does not change, but reduce the current provided by batteries, the laser will reduce the range of brightness will become weak, but not very noticeable. When the battery output voltage less than 0.9V, the voltage regulator chips to stop working, the whole wireless presenter are in power of the state, can not control, the laser is not bright. The difference of IR technology and RF technology ofgreen laser pointershould be made clear. Internal voltage regulator chips without, with the battery power consumption, battery voltage and current supply will be reduced. At this time, laser range and brightness down more quickly than with a fast voltage regulator chip. When the voltage drops below 0.9V, the control circuit to be wrong, wrong, or a control does not respond, then the laser intensity becomes very weak. Control distance by the receiver and transmitter use the location and direction of the impact. Aligned receiver transmitter to control the distance of the farthest. Other cases the impact will be more or less control the distance. General requirements for the laser beam diameter at the 10M is not greater than 28mm. Laser spot is smaller, focused as possible. If more divergent points of light, or with obvious astigmatism, the laser module is usually used to focus the lens is not very good. green laser pointeradopting the infrared technology has the directivity. The brightness of the primary laser spot with the launch of the laser power or the size of the laser energy. Higher laser power, laser more bright. The smaller the laser power, the more the dark about the laser. In the laser pointer, laser pointer, when the use of laser for laser power, the Chinese do not have clearly defined. Provisions of the United States is not greater than 5mw (mW), which is less than or equal 5mw (mW). More stringent requirements in respect of Europe, can not be greater than 1mw (mW), which is less than or equal 1mw (mW). If the products meet U.S. standards, often the actual power in the 2-3mw, on some bright; meet European standards, can only be 0.5mw, on some bleak. The emitter ofgreen laser pointershould stay aligned with the receiver ofgreen laser pointer. In order to meet domestic requirements brighter points of light, the products promise to meet U.S. standards are that the power in 3mw (mW) or so, less than 5mw (mW). If some particularly prominent brightness laser pointer, usually more than the U.S. standard. This ultra-bright laser pointer would be harmful to both people and pets, pet's eyes shine and will cause damage. There should be no obstacle between the emitter ofgreen laser pointerand receiver ofgreen laser pointer.