User's Manual

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Second Call: When there’s a second incoming call, press "play" button
access the second call, current call will be remained, and then press and
hold the "Play" button 1second to switch between the second call and
the previous call, short press "play" button to end the current call.
Volume Up: Short press the up button once quickly. Your earbuds will
sound a high pitched tone when you have reached their maximum
volume.
Volume Down: Short press the down button once quickly. Your earbuds
will sound a low pitched tone when you have reached their minimum
volume.
1.4.5 Working time:
Stand by time: more than 120 Hours
Play time： 10 Hours with 60% volume
Talk time： 15 Hours
Charging time：About 1 Hour
1.5 Acoustic specifications
1.5.1 Microphone
Type: Omni- direction, Electret microphone.
Sensitivity: -42 dB @1 K Hz, 2.5V
Operating voltage: 2~10 V
Frequency response：100 Hz~ 8K Hz
Resistance：More than 2.2K Ohm
1.5.2 Speaker Unit
Dimension: 6 mm
Type: Dynamic, Fe-Fe-Be magnet, 9u diaphragm.
Impedance: 32 Ohm
The sound pressure level (SPL): 98 dB +/-3 @ 1K Hz, 1mW input
Frequency response： 20 Hz~ 15K Hz
Power rating：4mW
Power Maximum：10mW