Hands-free: Hands-free headphones. Hands-free device service, which is used for making phone calls. In other words, when this service is enabled, once there is an incoming call, the mobile phone will use the Bluetooth headset as the microphone and receiver by default.
Extended data:
When purchasing headphones, the following aspects should be considered:
1, product quality
When buying Bluetooth headsets, we should pay more attention to the quality and performance of the products, such as battery life and radiation. However, due to cost control, the general inferior or inferior Bluetooth headsets can not be guaranteed in terms of workmanship or materials, and the product quality is poor, and the actual use function data is quite different, resulting in a large amount of radiation.
2. Call quality
Because the call quality is a basic parameter to measure the quality of a Bluetooth headset, generally speaking, the call quality of a Bluetooth headset with a lever design is better than other types of products because its microphone is closer to the mouth.
3. Idle time
Because this is the same as the daily use of mobile phones, the longer the standby time of headphones, the trouble of frequent charging can be avoided, which is also one of the standards to measure the performance of Bluetooth headphones.
Step 4 dress comfortably
Human ears are delicate. If the ear hook material of the earphone is not good, or the design has some defects, it will feel uncomfortable after wearing it for a long time. So check carefully before buying and choose a Bluetooth headset that suits your ear type.