What is the TWS wireless bluetooth headset ?

Since iphone 7 canceled the 3.5mm jack in 2017s, The bluetooth wireless headset market is growing rapidly. Especially the TWS wireless bluetooth headset. So what is the TWS wireless bluetooth headset ?

TWS: Abbreviation for True Wireless Stereo, This ture wireless stereo implementation is based on the development of IC chip technology. Technically speaking, The mobile phone connected to the main speaker, then the main speaker connected to the speaker via bluetooth wirelessly to realize the true separation of bluetooth left and right channel.When stop connected, the main speaker return to mono sound quality. And this TWS technology is used in the bluetooth headsets field. So it has spawned a new product-TWS Bluetooth headset.