Bluetooth headset is to apply Bluetooth technology to hands-free headset, so that users can avoid the bondage of annoying wires and talk freely in various ways. Since the advent of Bluetooth headset, it has been a good tool to improve the efficiency of mobile business families. Bluetooth is a low-cost, large-capacity short-range wireless communication specification.
The battery life of Bluetooth headset is generally around 24 hours. Take AirPods2 as an example. After AirPods2 is equipped with H 1 chip, the battery life has been improved, but the overall comprehensive battery life is still around 24 hours. You can listen to audio for about 5 hours and talk for about 3 hours without using a charging box for a single earphone. After charging 15 minutes, you can listen to audio for about 3 hours or talk for about 2 hours.
Tips for buying Bluetooth headsets
First, check compatibility.
First of all, you need to see if this headset is compatible with your mobile phone. At present, there are three main specifications of Bluetooth headsets, HSP, HFP and A2DP. HeadsetPro-file(HSP) stands for headset function, which provides the basic functions needed for communication between mobile phone and headset. HandfreeProfile(HFP) stands for hands-free function, and HFP adds some extended functions on the basis of HSP. Advanced daudiodistribution profile (A2DP) refers to Bluetooth audio transmission model protocol.
A2DP is an advanced audio transmission standard, which allows the transmission of stereo audio signals. Compared with single encryption used for HSP and HFP, the quality is much better. A2DP can connect two devices that also support Bluetooth sound transmission, and both can output music with CD quality (16bits, 44. 1kHz). If one party does not support A2DP, the sound effect can only output HandsfreeProfile(8bits, 8kHz). Even if the headphones are designed with binaural tubes, they can only have the mono sound quality of ordinary phones, which is far from the real stereo sound.
Second, look at the chip brand.
At present, there are two main chip suppliers of Bluetooth headsets, one is CSR in Britain and the other is Broadcom in the United States. Broadcom products occupy more than 80% market share.
Third, look at the transmission distance
The transmission distance of Bluetooth headset has nothing to do with Bluetooth version, but mainly depends on the advanced level of technology. The standard transmission distance of PowerClass2 is 10 meter; The upgraded PowerClass 1 increases the transmission distance to 100 meters and provides Hi-Fi stereo effect.
Generally speaking, the distance between a mobile phone and a Bluetooth headset is not too far. If there is no big obstacle in the middle, the transmission quality is very good within 7 meters, and there will be breakpoints beyond 8 meters. Beyond 10 meter, the Bluetooth device will lose its connection.
Fourth, choose the version.
When you buy a Bluetooth headset, you will often see numbers such as Bluetooth 1. 1, 1.2, 2.0, etc. These numbers represent different versions and also represent the anti-interference ability of headphones. At present, 1. 1 is the most popular, 1.2 is the new mainstream, and 2.0 has just been released. Different versions of Bluetooth are related to the quality of the received signal. The new version puts more emphasis on overcoming noise interference. The new version can be backward compatible, and consumers should weigh the price and demand when buying.