Have in-ear smart sensor or internal ear detection sensor.
NEWEST Upgraded Features :
1.Open the lid to connect (pop up animation when connect with ios)
2.100% 3 real battery on ios (2 earbuds and charging case)
3.Air2th 1:1 size
4.Support Qi wirelss charging
5.Auto power on and power off
6.Could be used separately or together
7.6D hifi stereo
Connect with IOS device :
1.Open the lid of case and turn on the bluetooth on device , the pop up function will work . And you will see a notice to press the button on the back of charging case .
2.Long press(about 4s) the button , you will see the white led blink . And the earbuds will connect with phone automatically .
Connect with Android or other device :
1.Open the lid of case and long press(about 4s) the button until make sure that the white led on the charging case blink .
2.Turn on the bluetooth on device to found the earbuds bluetooth signal to connect .