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Notes and Q & A
A
．
How to reconnect when connection fails?
Once the headset is connected to your mobile phone successfully, it will
automatically connect to your phone every time you turn on the headset. If
the connection fails, please connect to “RK4000” on your phone’s
Bluetooth again.
B. How to delete paired records?
Press the MFB and Volume – button at the same time for 5 seconds to
clear the pairing record in the headset. If the pairing record is cleared,
the connection cannot be called back, and you will need to re-pair the
device.
C. What’s the password for pairing?
Some connection devices require a password for pairing. Please try 0000,
8888, 1111, or 1234.
D. What devices can you use to charge the headset?
As long as the DC voltage meets a 5V current above 500mA, any car
charger, travel charger, computer USB, etc., can be used to charge the
RKING4000.
E. What if you can’t power on or connect?
You can try the charging reset method by plugging in the charging cable
to charge the headset. To complete the reset, shutdown and restart the
headset. If it still cannot be used normally, contact customer service or the
manufacturer for technical support.
F. Why does the headset power off automatically?
The headset will turn off if there is no connection for over 10 minutes or
the battery voltage is less than 3.1V.
G. How does a three-way call work?
1. Press the Multi-Function Button (MFB) to answer a new call and
hang up the current call.
2. Double-click the MFB to answer the new call and put the current
call on hold.
3. Press and hold the MFB for 2 seconds to keep the current call
and reject the new call.
4. In a three-way call, double-click the MFB to switch between the
current call and the call on hold.
