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HD 4.50BTNC/HD 4.50R
Product overview
Overview of buttons
Power button
Press
Function
Page
2s
Switches the headphones on and off
1x
Activates/deactivates
NoiseGard
(audio cable
connection with sufficient battery life)
Multifunction button
Press
Function
Page
1x
Accepts/ends a call
Accepts an incoming call and holds the active call
Plays/pauses a track
2x
Redials the last number called
Holds/unholds a call
Accepts an incoming call and ends the active call
Toggles between 2 active calls
2s
Rejects a call
Activates the voice control
Transfers a call between the smartphone and the
headphones
Plays the next track
Plays the previous track
Rewinds a track
Fast-forwards a track
button