Plantronics Discovery 975 Plantronics Discovery 975 Bluetooth headset advantages: it is very convenient to answer calls and the sound quality is very good.

It is also loud outdoors.

Disadvantages: Can't listen to music, can't use WeChat, the standby time is not very long (there are a lot of calls, it has to be charged in a day) Summary: Old style classic, white and neat, generally ok.