- 4 -
Basic Operation
Button
Function
Operation Instructions
MFB
Power on
When the device is off, press and hold the Multi-Function Button
(MFB) for 2 seconds to power on. The power-on prompt tone is
"Power on".
Power off
When the device is on, press and hold the MFB for 3 seconds to
power off. The power-off prompt tone is "Power off".
Enter pairing mode
Turn on your phone’s Bluetooth and click "RK4000" to pair to
headset. After a few seconds, a tone will indicate that pairing was
successful. The LED turns to blue and blinks slowly (the blue light
blinks once for 10 seconds).
Play / Pause
When playing music, press the MFB to pause / play music.
Redial a call
Double-click the MFB to dial the last call.
Voice dial
Press and hold the MFB for 1 second, then release.
Audio switch
When on a call, hold down the MFB for 2 seconds to switch the
audio between the phone and Bluetooth headset.
Three-way calling
A. When an incoming call occurs during a call, press the MFB
to answer the new call and hang up the current call.
B. Double-click the MFB to answer an incoming call and put the
current call on hold.
C. Press and hold the MFB for 2 seconds to keep the current
call and reject the new call.
D. In a three-way call, double-click the multi-function key to
switch between the current call and the call on hold.
Answer a call
Click the MFB when a call is coming in.
End a call
To end a call, click the MFB.
Reject a call
To reject an incoming call, press and hold down the MFB for 1
second to reject the call.
Volume up
When talking or playing music, click the button to
increase volume.
Next song
When playing music, press and hold the button for 1
second to skip to the next song.
Volume -
Volume down
When talking or playing music, click the Volume - button to
decrease volume.
