Part names and functions
L/R Indicators
Call microphones
Charging LED
Bluetooth LED
Control button ( 
/ 
)
Pairs the headphones with Bluetooth devices.
link
Connects to Bluetooth devices. link
Turns the power off. link
Performs playback operations. link
Volume buttons (+/–) link
Stereo mini jack (2.5 mm)
Connects to playback devices using the included audio cable. link
USB port (Micro-B)
Call button
Indicates the remaining battery power. link
Controls call operations on the mobile phones connected via Bluetooth. link