Monophonic channel
Single ear Bluetooth earphones are mostly wireless and compact styles that can be worn directly on the ear. Their main function is to answer and end calls, and they can be adjusted to control the volume. Some models of single ear Bluetooth earphones also have technologies such as dual standby, dual microphone, and Liyin (also known as noise reduction, which can achieve a better call environment).
stereo
Stereo Bluetooth earphones are based on the A2DP Bluetooth stereo protocol supported by mobile phones. Only when mobile phones support the A2DP Bluetooth stereo protocol can stereo Bluetooth earphones be connected to enjoy Bluetooth earphone music. Stereo Bluetooth earphones have styles such as neck hooks, earphones, clips, and glasses, among which the neck hooks and clips are all wired Bluetooth earphones. The main function is not only to answer and end calls, but also to directly listen to music. At the same time, some stereo Bluetooth earphones also have a liquid crystal display screen, which not only allows you to easily see the call number, but also has functions such as displaying song names and lyrics.
True wireless
The biggest difference between true wireless Bluetooth earphones and traditional Bluetooth earphones is the use of Multiplexlink multi-point wireless interconnection technology. As a completely new concept of wireless Bluetooth headphones, it achieves wireless connection between the left and right ears. This type of earphone completely eliminates the method of wire connection externally, and both the left and right earplugs can work independently, allowing for hands-free communication. When you need to transform into dual channel stereo, turn on the other earplug and approach it to automatically form a dual channel stereo mode. When sharing music, you won't be trapped by wires, making it more convenient to use.

Step 1: First pair the first phone with Bluetooth
1. When the Bluetooth earphones are turned off, press and hold the intelligent on button for about 10 seconds (or directly dial the ON/OFF button to the ON state) until the earphone indicator light flashes alternately red and blue, entering the searched state
2. Turn on the Bluetooth function of mobile phone 1, search for Bluetooth devices, find the "device" name of the Bluetooth earphone, and click pairing to complete the connection
Step 2: Pair another phone with a Bluetooth headset
1. Long press and hold the smart button on the headphones until the indicator light turns off, turn off the Bluetooth headphones, and turn off the Bluetooth of the first phone,
2. Turn on the Bluetooth earphones again until they are searched for (flashing red and blue lights)
3. Turn on the Bluetooth function of your phone, search for Bluetooth devices, find the "device" name, and click pairing to complete the connection
Step 3: Connect the first phone to the Bluetooth headset again
1. Turn on the Bluetooth function of the first phone and find the previously connected "Q8", click Connect
You can complete the intelligent one drag two.

Another important determinant of Bluetooth earphones is the transmission distance, which is independent of the Bluetooth version and depends on the Bluetooth technology PowerClass. Most mobile phones and devices use PowerClass2, with a standard transmission distance of 10 meters; The upgraded PowerClass1 increases the transmission distance to 100 meters, and both versions support the A2DP stereo transmission protocol, which can be interconnected with stereo headphones. Generally speaking, the distance between a phone and a Bluetooth earphone is not too far. If there is no large obstacle in the middle, the transmission quality is good within 7 meters, and there will be a breakpoint if it exceeds 8 meters! Bluetooth devices exceeding 10 meters will lose connectivity.
According to the actual feeling of use, the distance between the phone and the Bluetooth earphones is directly proportional to the call noise; In addition, when using stereo Bluetooth earphones to listen to music, do not be too far away from the phone, as it may cause interruptions. Many consumers hang Bluetooth earphones on their ears at any time, so styling has become a basic requirement; And everyone has different ear shapes, so users need to try wearing comfort before making a purchase; People who wear glasses need to pay more attention, as many Bluetooth earphones may conflict with the legs of the glasses, so it is important to try them on before you know.

If you want to connect a newly purchased Bluetooth speaker to your phone's Bluetooth, you must first check the Bluetooth model of the speaker, which is usually marked at the speaker switch or in the manual. Then turn on the on button of the Bluetooth speaker. For example, the on button of this Bluetooth speaker is the circle in the middle, which can be opened by long pressing. When opened, there will be a prompt sound indicating that it has been turned on. Let's next set up our phone, find the "Settings" option on the desktop, and click to enter.
Find the "Bluetooth" option on the settings page, click and enable Bluetooth. After entering the Bluetooth interface, drag the screen to the bottom, find "Search Device", and directly click on "Search Device" to start searching for available Bluetooth devices in the surrounding area. After the search is completed, the Bluetooth speaker model will be displayed in the available device area. Click on the model of the speaker, click Pair, and the speaker will start pairing with the phone. After completing the pairing operation, the Bluetooth model of the Bluetooth speaker will be displayed in the "Paired Devices" section above. At this point, the connection has been successful, and you can listen to music with the small speaker.