Bluetooth headsets are becoming a product that people are increasingly favored because it can solve the dangers of the phone we started answering, but also let us not have to be wrapped around an annoying headphone cable, but do you know how to choose a Bluetooth headset?
On-demand optional Bluetooth headset
According to a salesperson of a mall's Bluetooth headset counters, Bluetooth headsets are based on the use of Bluetooth technology in hands-free headsets, allowing users to avoid the annoyance of the wires and easily communicate in a variety of ways. “Now there are more and more car owners. Answering the phone during driving is a very dangerous thing. With the continuous improvement of the public’s safety awareness, people like to wear a Bluetooth headset to facilitate the call and also ensure the safety of driving. In addition, many citizens like to wear Bluetooth headsets to listen to music, the current Bluetooth headset sales are very optimistic.†Sales staff said.
It is understood that the Bluetooth headset on the market is roughly divided into two types, a monaural Bluetooth headset and a stereo Bluetooth headset. Monaural bluetooth headsets are mostly wireless compact styles that can be worn directly on the ear. The main function is to answer and hang up the call for volume adjustment. In addition to answering hang-up calls, stereo Bluetooth headsets can listen directly to music and have good sound quality.
Sales staff suggested that the public should choose Bluetooth headset according to different needs. Business people need to answer the phone frequently, so they should choose a Bluetooth headset with good call quality and long standby time. Music lovers who wear Bluetooth headsets must choose stereo Bluetooth headsets with high quality and high quality. "Consumers may be confused by some concepts when buying Bluetooth headsets. Generally speaking, stereo headphones are not necessarily stereo headphones; stereo headphones must be dual-channel (multi-channel) headphones. To understand this little knowledge, you can Better choose the Bluetooth headset that suits you,†said the salesperson.
Bluetooth headset to be compatible with mobile phones
It is understood that Bluetooth headset specifications, there are HeadsetPro-file (HSP), HandfreeProfile (HFP) and A2DP three specifications. The HSP provides the basic functions required for communication between a mobile phone (mobile phone) and a headset. HandfreeProfile (HFP) adds some extensions to the HeadsetPro- file (HSP). A2DP (Advanced Audio Transmission Specification) allows transmission of stereo audio signals.
"Because of the large number of mobile phones and headsets, the most troublesome consumer is the compatibility issue between mobile phones and Bluetooth headsets. Consumers must first study what kind of specifications their phones support before purchasing, and then find suitable pairs of Bluetooth headsets. Among them, the HFP-formatted Bluetooth headset supports the complete function of the mobile phone, and the consumer can simultaneously operate the mobile phone to set the hands-free option such as redialing, call reservation, and incoming call rejection on the headset, the salesman said.
When consumers purchase Bluetooth products, they often see Bluetooth 1.1, 1.2, 2.0, etc. The numbers represent different specifications. The higher the number, the newer the version. The new version can better overcome the noise interference, and all the latest Bluetooth versions are designed to be backward compatible with all previous versions. The 2.0 version of the device and the 1.1 version can also be freely connected. The compatibility of 3.0 is relatively strong and is a mature technology. Battery life is also increasing because of technological advancement. Consumers should measure prices and demand when they buy.
Bluetooth headset charging 2 hours best
The Bluetooth headset is a small electrical device. When it is used for the first time, try to charge the headset for 2-4 hours. After that, charge it for 2 hours. It is better not to exceed 4 hours. Some consumers think that it takes 24 hours to charge for the first time. This is unfounded, and overcharging will affect the battery life of Bluetooth headsets.
It is understood that the Bluetooth headset transmission distance has nothing to do with the Bluetooth version, but depends on the Bluetooth technology PowerClass. Most mobile phones and mobile devices use the PowerClass2. The standard transmission distance is 10 meters. The upgraded PowerClass1 increases the transmission distance to 100 meters. “In practical use, the distance between the mobile phone and the Bluetooth headset is proportional to the noise of the call. Therefore, try not to keep the Bluetooth headset away from the mobile phone when using it. If there is no big obstacle in the middle, the transmission quality is good within 7 meters. Breakpoints may occur for more than 8 meters, and call quality exceeding 10 meters is greatly affected," the salesman said.
In addition, the salesperson reminds that since the Bluetooth headset may need to be worn on the ear for a long time, and the ear is soft, wearing it for a long time may make the ear uncomfortable. Therefore, it is necessary to personally wear a Bluetooth headset before purchase, and feel good comfort and then choose to purchase. .
Related Links: Buying Tips
Select the mobile phone with the brand
Many large mobile phone manufacturers will introduce various mobile phone accessories, including Bluetooth headsets.
It is best to choose the same brand of Bluetooth headset as your phone to ensure the best compatibility and connection stability. This is the reason "1+1=2".
Cheap is not good quality
A good quality Bluetooth headset is not cheap, not three or four hundred dollars. On the market 30-50 yuan can buy a Bluetooth headset, but the work is also extremely rough. It is recommended to choose a brand of Bluetooth headset, a point of the price of goods, you understand.
Clear use repurchase
When choosing a Bluetooth headset, be sure to clearly purchase the main purpose of the Bluetooth headset. If used to answer the phone, select the monaural Bluetooth headset; mainly used to enjoy music, select the stereo Bluetooth headset.
Details can be seen clearly
When buying a Bluetooth headset, check whether the Bluetooth headset has any flaws, whether the shell connection is tight, there is no gap, and whether the keys on the headset are elastic. Be sure to turn on the Bluetooth headset and connect it to your phone for call testing. Also check that the accessories are complete, otherwise it will affect the use.
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Domestic communication, 4 g module in addition to support two kinds of LTE FDD LTE/TD - LTE standard, also compatible with 2 g / 3 g down, support td-scdma/WCDMA/EDGE/GP/GSM/CDMA1X/EVDO mode. The data service downstream rate can reach up to 100Mbps, the uplink rate can reach up to 50Mbps, providing customers with high-speed Internet access and wireless data connection and other functions. In addition to providing high-speed data access, it also provides voice, SMS, communication book and other functions, which can be widely used in notebook, tablet, touch screen communication devices, smart phones, video surveillance, multimedia mobile phones and vehicle equipment and other terminal products and vertical applications. Today, I will introduce you to what is 4G module and how to use 4G module.
What is 4G module
4G module said TD-LTE and FDD-LTE and other LTE network standards are collectively referred to. It has the characteristics of fast communication speed, wide network spectrum and flexible communication. 4G module refers to a product whose hardware is loaded to the specified frequency band, software supports the standard LTE protocol, and software and hardware are highly integrated and modular. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions.
Second, how to use 4G module
The 4G module is usually inserted into the circuit board or the patch module is welded to the circuit board, and the corresponding SIM card is inserted, and the network is connected through the 4G cellular network. In the common transparent transmission mode, data can be directly sent to the target server through the 4G module, and the 4G module can receive data from the server at the same time, and send the data to the serial port, which is received by the serial port device connected to the 4G module. Users do not need to pay special attention to the data conversion process between serial port data and network data packets, only need to insert the module to the target position, simple connection and parameter setting, you can achieve transparent transmission between the serial port and the network end.
What is the 4G module How does the 4G module work
4G module, also known as 4G transmission module, 4G communication module, 4G LTE module. It is a kind of hardware loaded to the specified frequency band, the software supports the standard LTE protocol, and the software and hardware are highly integrated modular products, with good compatibility, fast communication speed, large amount of communication data, wide network spectrum, communication flexibility and other characteristics, widely used in electric power, environmental protection, finance, industrial automation and other fields.
The working principle of 4G module
It has the characteristics of fast communication speed, wide network spectrum and flexible communication. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions.
Through high-speed networking, the 4G module transmits all terminal business data and equipment operating status to the business center in real time. Through the management monitoring platform, the terminal equipment operating status can be monitored in real time and equipment faults can be timely checked. The efficiency has been greatly improved in many aspects such as operating cost, operation scale and service timeliness. Suitable for shared massage chair, public charging pile, vending machine, vehicle system, environmental monitoring, power remote monitoring and other industries.
4G module refers to a product whose hardware is loaded to the specified frequency band, software supports the standard LTE protocol, and software and hardware are highly integrated and modular. It has the characteristics of fast communication speed, wide network spectrum and flexible communication. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions. Through high-speed networking, the 4G module transmits all terminal business data and equipment operating status to the business center in real time. Through the management monitoring platform, the terminal equipment operating status can be monitored in real time and equipment faults can be timely checked. The efficiency has been greatly improved in many aspects such as operating cost, operation scale and service timeliness.
Good compatibility
4G module supports FDD LTE/TD-LTE two LTE standards, can also be backward compatible with 2G/3G, support LTE-FDD, LET-TDD, WCDMA, TD-SCDMA, CDMA, GSM and other bands.
Large amount of communication data
4G module downstream rate can reach up to 150Mbps, uplink rate can reach up to 50Mbps, to provide customers with high-speed Internet access and wireless data connection and other functions, suitable for large data transmission applications, such as: remote video surveillance.
High communication speed
The 4G module has a lower ping value than the 2G/3G module, and it takes less time for the module to send data packets to receive the response from the server, which is suitable for applications requiring high response speed, such as remote alarm.
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