Directory:
A FAQ, 2.4 G wireless products.
Second, how to give 2.4 G keyboard or to create a good working environment?
3, 3 d roller non electrical performance is bad, can't identify set mode.
Four, about the mouse pull out plug before it can be used to solve problem.

A FAQ, 2.4 G wireless products.
1. The 2.4 G wireless signal transmission of the cause of interference or cut off?
A. obstacles; Relatively short wavelengths of 2.4 G, diffraction capability is not strong, and easy to be absorbed by the fiber, so between receiver and transmitter, an obstacle, the more the greater the effect. Metal case can also be cut off, when using, can be put on the host front-end receiver USB port. B. electronics interference; Electronic products are required to pass through regular national testing agencies for safety testing. Such as: domestic CCC and SRRC, the United States FCC, European CE; Some amounts of specification products will also influence the 2.4 GHz data transmission, affect the distance. C. The impact on the environment; 2.4 G is sensitive to some of the magnetic field and electric current pulse, should avoid as far as possible.

2.2.4 G wireless signal through sexual performance?
Due to the relatively short wavelengths of 2.4 G, when ChuanShe wall attenuation, the signals will be distance will be discounted, glass door, wall of steel and reinforced concrete mixed wall slightly better.

Bluetooth between 3.27 M and 2.4 G, have why to distinguish?
A. 27 m for wireless keyboard products using wireless technologies, initially only 1.5 MiYouXiao distance, its data transfer rate is low, need to work continuously, so the power consumption; Signal staccato one-way transfer mode is easy to happen; In addition to security level is low, it's easy to have a similar product from interfering with each other. B. 2.4 G data rate quickly, the transmission efficiency of up to 2 MBPS, 416 times faster than 27 m transmission speed, quicker to finished processing a signal to send, in terms of power consumption is greatly reduced, the mouse sensitivity is improved; Bidirectional transmission, to avoid loss of code missing data; Automatic frequency control, can automatically find the available frequencies, avoid interference; Each group of products built-in matching ID code, not mix between different brands of products; C. bluetooth use frequency is consistent with 2.4 G, but stronger anti-interference ability. On average 2.4 G wireless technology, bluetooth technology increases the adaptive frequency control technology, the frequency hopping communication process jump automatically to avoid the interference point again and again, and with the minimum transmission power, the lowest intercepted probability, frequency hopping in and no interference on the channel for a long time to keep high quality communication purposes; To achieve full-duplex transmission mode () to send data at the same time also can receive data, automatically FM 1600 times/SEC. In addition, this technology can make the bluetooth receiver and transfer both with 1 MHZ intervals, on its division 79 is a spectrum of the counterpart; Bluetooth mouse is easy to use is also high, now a lot of laptops and other products are integrated within the bluetooth module, all kinds of bluetooth device which can realize the wireless connection between the agreement; However, bluetooth technology has larger power,

4. The new 2.4 G wireless product is energy saving?
2.4 G transmission rate 4800 BPS, 416 times faster than 27 m transmission speed, transmission rate speeding up, the 2.4 G wireless can finish faster than 27 m wireless processing a signal is sent, therefore, in terms of power consumption 2.4 G wireless is also greatly reduced, extend battery life.

5. New 2.4 G mouse can play a game?
Certainly, 2.4 G wireless several transmission rate should be efficient, to make the mouse more sensitive response, effectively strengthen performance, intense game again also won't delay;

6. Why the intermittent failure occurs on using 2.4 G products?
A. interference; When the outside world has a strong magnetic field interference, radiation, will greatly affect the signal transmission, cause pause; Connection to the yard. B. operating system; When the computer running program takes up too much computer resources, lead to the CPU is unable to process the data in a timely manner. C. check whether the battery is enough. (low pressure alarm lights flashing)

7. 2.4 G frequency higher than mobile phone spectrum, its radiation is very big? Make a difference to the human body?
Frequency is higher than cell phones, but its radiation is very small. Radiation is not the size of the sheet is determined by the frequency of the high and low, has much to do with the size of the transmitted power. GSM mobile phones of peak transmission power of 1 w, and the peak transmitted power is less than 2.4 G keyboard product mobile phones one of copies, which greatly reduces the radiation to the human body.

8. 2.4 G products eavesdropping, in danger of being controlled?
2.4 G products, strong anti-interference, frequency 2402 MHZ to 2480 MHZ, 16 groups of a spectrum, in two-way transmission mode, if the same frequency interference, will automatically FM avoid; And every frequency, 256 group ID code encryption on strictly;

9. Why do laser mouse is normal when using the following lamp not bright?
The wavelength of visible light range between 390 ~ 770 nm, general laser wavelength of 850 nm laser mice, beyond visual range to the naked eye. But when the camera with a computer, mobile phone camera visible red light;

10. Laser mouse harm the eyes?
New laser mouse at the time of production for each product will be strictly controlled in the range of regulations of safety, power so you can rest assured use;

11. What's the difference between the optical mouse and laser mouse?
A. optical mouse using LED as the engine, the diffuse reflection imaging (diffuse reflection into all directions), the surface such as glass, ceramic tile not draw lines; LED long service life, low cost, easy manufacture, now the market mainstream. B. laser mouse USES the laser as the engine, the specular reflection imaging, specular reflection pattern can produce greater contrast and the imaging sensors are more likely to identify the image, the mouse positioning more accurate; Good laser for a single wavelength, focus, reflection strength better than LED, can almost work in any surface; Low power laser engine, so in terms of energy saving is better than that of the LED; But the high cost is very high, life is shorter than the LED;

12. Mouse button 4 and 5 before why no function?
Upstart operation is more convenient for the customer, some mouse button design. 4 and no. 5, in my computer, a web page can use its function (forward) (back);

13. 2.4 G wireless optical mouse put on after the battery has no action

4, test validation:

Verified, cancel the USB Root Hub "allow the computer to turn off this device to save power" option, after the mouse pull out plug after 50 times many times still normal USB recognition, function is OK. Experiment shows that the above method is effective.
Reference information:
Why after startup pull out plug a USB mouse can use?
Q: my motherboard is the synthetic P4I45PE, USB mouse, installation is WinXP system. Recently for a period of time after frequent boot the mouse has no reaction, can be normal use after unplug the mouse reinsert. Change the USB port is the same phenomenon, do not know what is the reason?
Answer: this kind of question related to power supply system, more do not know you recently staged what set operation, you can troubleshoot according to the following method:

1. If you are using WinXP, set off to STR/STD (hang a memory/hang a hard disk), then start again after entering the system, perhaps because of advanced power management functions caused the USB device can't normal power supply. Please use management account login to WinXP, use the mouse to right click on the "my computer", then click "properties", enter the page of "hardware" of the "device manager". Find the USB controller in the device manager, unfolds will see the "USB
The Root Hub "option. Double-click to open, and then in the" power management "page" allow the computer to turn off this device to save power "option before hook removed.

2. If the above method doesn't work, just enter the motherboard BIOS power management options in the advanced power management mode by S3 (STR) change for the S1 (POS).

3. If you use a source without the USB Hub, mouse took on the USB Hub, so also can lead to the problem of insufficient power supply. Because all in passive USB Hub, USB interface's electricity comes from a USB interface, if a 4 port USB Hub to connect the 4 USB device, each USB port can only get 500 mah / 4 = 125 mah power supply. If this is the case, try to pull a few USB devices.