When it comes to wireless technology, let me briefly explain: “Using the radio band to transmit data to achieve the technology that does not need to use wire transfer” is wireless technology. Such as infrared, microwave, radio broadcast, GSM and Bluetooth or IEEE 802.11 are all specifications for wireless transmission. The main difference between them is the use of different bands and channel technology, so there is a big gap in the bandwidth, effect, and distance of the transmission.
At present, the mainstream wireless mouse in the market has two transmission modes, one is called Bluetooth, and the other is called 2.4GHz wireless technology. But in fact, the radio bands used by these two technologies are 2.4 GHz to 2.5 GHz, the international common free radio channel. In addition to wireless mice, the products used in this band include IEEE 802.11 wireless network, Bluetooth specifications, medical appliances, home wireless phones, and even microwave ovens! It is conceivable that this small band is filled with so many things, it is very crowded, and the other key point is that it may interfere with each other. Therefore, it is necessary to rely on different communication protocols and techniques such as frequency hopping to make the transmission of various devices as far as possible. Not affected.
Bluetooth, 2.4GHz which is better?
For wireless mice, the use of 2.4GHz transmission has been a trend, because 2.4GHz technology is almost a complete victory and non-directional compared to the low penetration of the previous 27MHz channel and the inconvenience caused by high latency. And can be mobile transmission features, of course, suitable for mouse product applications; the disadvantage is probably that the price will be slightly higher.
2.4GHz power-saving and high stability
With the current 2.4GHz wireless transmission device, the receiver is getting smaller and smaller. Logitech’s Nano series can be as small as nearly 5 yuan, compared to receivers with more than one index finger length three or four years ago. A lot of progress.
In addition, most of the devices using 2.4 GHz also have built-in power control protocols, which can effectively reduce power consumption. This way, for products such as mice, it can not only increase the use time but also reduce the electromagnetic waves slightly. The transmission distance is about 8 to 12 meters, and the penetration is about two layers of walls. In terms of such transmission quality, it should be enough to meet the needs of the mouse itself.
Bluetooth has frequency hopping and spread spectrum
What is the advantage of Bluetooth, which also works in the 2.4 GHz band? Bluetooth has frequency hopping spread spectrum technology, which can support one-on-one, one-to-many work at the same time. Moreover, it requires a process of repairing or frequency modulation when connecting with a general 2.4 GHz wireless device, which is convenient. Just in the environment of many Bluetooth devices, because of the same packet specifications, the chance of interference is increased.
The disadvantage of Bluetooth is that the unit price is more expensive. Although many notebooks have built-in Bluetooth modules, the Bluetooth module on the mouse has to pay extra premiums in addition to the hardware overhead, so the market emphasizes Bluetooth transmission. Most of the devices are more expensive. Another point is that Bluetooth consumes more power than a typical 2.4GHz transmission.