Foneng Bluetooth Air Earphones BL39

Air conduction technology, no need to wear in-ear, no ear swelling, 
7 hours of music life, charging port:type-c ,capacity:   3.7V,80mAh charging time:1.5 hours .titanium alloy memory collar, secure to wear and not fall off, touch adjustment, up and down songs, answer calls, convenient adjustment.
Wear headphones and long press the right earphone LOGO for 3 seconds to turn on. During playback, single press to play/pause and double press to next song.