User's Manual

Product feature
Pairing name
B021
Li-battery capability
400 mAh
Talking time
25hours
Playing time
25hours
Standby time
3months
Charging time
2 hours
Charger mode
Micro USB 5V/1A
RF Transmit Power
6 dBm
Frepuency Range
2402-2480MHz
Straight-line distance
A single earphone bluetooth distance will be more than 10
meters indoor , outdoor more than 7 meters. If you use share
me mode, the distance is more than 5 meters indoor and
outdoor.
It is necessary to enter the passcode if
bluetooth connection version 2.0 below
0000
B021 bluetooth earphone instructions
Function
Key operation
LED status
Power on
Long press button" "about 3
seconds
The first device pairing: red and blue
LED slow flash alternately
standby (Reconnection): blue LED
light flash once per 1s
Power off
Long press button" "about 4
seconds
Red LED light go out after 2s
Pairing
Long press button" "about 5
seconds
Red and blue LED slow flash
alternately
Connection
N/A
The blue light flashes twice for 5
seconds
Disconnected state
N/A
Blue light quick flash interval 200ms
Play
Short press button" "
The blue light flashes twice for 5
seconds
Pause
Short press button" "
The blue light flashes twice for 5
seconds
Volume up
Short press button" "(15
Level )
The blue light flashes twice for 5
seconds
Volume down
Short press button" "(15
Level )
The blue light flashes twice for 5
seconds
Next track
Long press button" "
The blue light flashes twice for 5
seconds
Previous track
Long press button" "
The blue light flashes twice for 5
seconds
Incoming call
Short press button" "
When the call: red light flash interval
200ms