What does the blue light in the wireless mouse keyboard mean? Please, 3Q.

Wireless technologies are divided into different categories according to different uses and frequency bands, including Bluetooth, Wi-Fi (IEEE 802. 1 1), infrared (IrDA), ZigBee (IEEE 802. 15.4) and other wireless technology standards, but for the current mainstream wireless keyboard and mouse, only 27Mhz, 5.4 MHz. Compared with the low transmission efficiency of 27Mhz, the transmission efficiency of 2.4G reaches 2Mbps, and there is no need to work continuously between the receiver and the transmitter, which greatly reduces the power consumption and prolongs the battery life. At the same time, in order to avoid the mutual interference of 27Mhz wireless bands, 2.4G also adopts automatic frequency modulation technology, so that both the receiving end and the transmitting end can find available frequency bands. In addition, more importantly, the 2.4G radio frequency wireless technology is a two-way transmission mode, which avoids the intermittent signal in 27Mhz one-way transmission. The 2.4Ghz non-networking scheme is much cheaper than other wireless network technologies (such as WiFi/ Bluetooth) because it does not need to pay any organization or individual patent fees. Due to the advantages of anti-interference, transmission speed and distance, the mainstream medium and high-end wireless mouse in the market mostly adopts this 2.4G technology.