When purchasing headphones, consider the following aspects:

Quality of products

Buying a Bluetooth headset should pay more attention to the quality and performance of the product, such as battery life, the amount of radiation and so on. The general inferior quality or quality of the Bluetooth headset, due to cost control, no matter in the workmanship, or the material can not be guaranteed, the product quality is poor, the actual use of the functional data is very different, and the radiation is very high.

1) conversation quality

Because call quality is a basic parameter to measure the quality of a Bluetooth headset, in general, the Bluetooth headset with a pole design is better than other types of products because its microphone is closer to the mouth.

2) Standby time

Because this is the same as the daily use of the mobile phone, the longer the standby time of the earphone, the more troubles that can be avoided from time to time, which is one of the standards for measuring the performance of the Bluetooth headset.

3) Wearing comfort

The human ear is relatively delicate. If the earloop of the earphone is not good, or there are some defects in the design, it will feel uncomfortable after wearing for a long time. Therefore, you should check carefully before purchasing to choose a Bluetooth headset that suits your ear shape.

use

Buying a Bluetooth headset is mainly for what to buy? It depends on what you do mainly by using it - 1 for language learning. Just use a lower-priced headset, with earmuffs with volume adjustment as well, 2 for listening to news. Ordinary electromagnetic headphones can be used. 3 for listening to music. For general music, just buy a mid-range machine, such as auscultation or head-mounted dynamic headphones. If you want to enjoy high-quality music, you should buy high-fidelity headphones, such as high-quality moving coil, flat film or condenser headphones. Among them, cost-effective BRD headphones are preferred. 4 easy to use. Wireless Bluetooth headsets don't need to be connected, they are very convenient to use, and there are headphones with radio function, so you can listen to all kinds of languages ??and music programs at any time. 5 channels. Mono and dual-channel amplifiers must be equipped with single and dual-channel headphones.

4) compatibility

When purchasing a Bluetooth headset, the most important question is whether the phone is compatible with the headset. Some Bluetooth headsets are not compatible with mobile phones, mainly because of different specifications. There are three main types of Bluetooth headsets: HandfreeProfile (HFP) and Headset Pro-file (HSP) and A2DP. HFP stands for hands-free function, while HSP stands for headset function. Consumers must first figure out which specifications their phones support, and then pick the right Bluetooth headset for pairing. A2DP is an advanced audio transmission specification that allows the transmission of stereo audio signals with much better quality than HFP and HSP.

The HFP format Bluetooth headset supports the mobile phone function more completely, and the consumer can operate the mobile phone to set the hands-free option functions such as redial, call retention, and call rejection. Bluetooth headsets from Nokia, Motorola, Sony Ericsson, etc. almost all support the HFP format. Some models also support HFP and HSP. For example, the Pentmet Bluetooth headset is A2DP format, compatible with HFP and HSP formats, and is currently the best format version.

5) Chip brand

The chip suppliers of Bluetooth headsets mainly include three major companies, one is the British CSR company, and the other is the American Broadcom company. Broadcom's products account for more than 80% of the market.

Transmission distance

The transmission distance of the Bluetooth headset is also a concern of everyone. The transmission distance of the Bluetooth headset is independent of the Bluetooth version, depending on the state of the art. The PowerClass2 has a standard transmission distance of 10 meters, while the upgraded PowerClass1 increases the transmission distance to 100 meters and provides Hi-Fi stereo effects. In general, the distance between the mobile phone and the Bluetooth headset is not too far, and the safe transmission distance is about 2 meters to 3 meters.

6) version

When consumers purchase Bluetooth headsets, they often see numbers such as Bluetooth 1.1, 1.2, 2.0+EDR, 2.1+EDR, and the numbers represent different specifications. Currently 1.1 is the most popular, 1.2 is the new mainstream, 2.0 is launched in 2006, 2.1+EDR version, the latest is 3.0 is the mainstream, 4.0 is the latest Bluetooth headset technology, these numbers represent the different versions, and also represent the headset Anti-jamming Bluetooth headset capability. The Bluetooth version is different and is related to the quality of the received signal. The new version emphasizes the ability to overcome noise interference. The new version is backward compatible, and consumers should measure the price and demand when purchasing.

shape

In addition to functional considerations, the appearance and wearing comfort of the Bluetooth headset is also a key factor that consumers must pay attention to when purchasing. Each person's face is different, users should try to wear comfort before buying, and then buy