MEElectronics Air-Fi Metro2 AF72 - Manual (Page 6)

Note: In order to save power, the headset will power off automatically if not
connected within 5 minutes of being turned on.
POWER ON/OFF
FUNCTIONS OPERATION TONE
Power on Press and hold button for
about 4 seconds until the blue
indicator light flashes
Four increasing tones
Power off Press and hold button
for about 4 seconds until red
indicator light flashes
Four decreasing tones
multifunction button
indicator light