Bowers & Wilkins PI4 Manual page 3

1. PI4 Carton Contents
PI4 headphones
Storage case
USB-C charging cable
Ear tips (small, medium and large)
Ear stabilisers (small, medium and large)
Document pack
2. Getting to know your PI4
2.1 Switching Headphones On and Off
Diagram 1 illustrates Power button functionality.
Switching On
The Power button is located on the left control unit.
Press and hold the Power button for 2 seconds. An
audible cue will be presented and the LED indicator
will light up in ether green, amber or red displaying
the current charge level.
Switching Off
Press and hold the Power button for 2 seconds.
An audible cue will be presented and the
headphones will power down when the LED
indictor is no longer lit.
2.2 Headphone Controls
Diagram 2 illustrates the headphone controls. The
following buttons on the right control unit are used to
for media playback:
Function Action
Press the Multi-function button
Play or pause
once.
Press the Multi-function button
twice in quick succession.
Play to next track
Note: functionality dependent
on source device.
Press the Multi-function
button three times in quick
Play previous track
succession. Note: functionality
dependent on source device.
Increase Volume Press the Volume + button.
Lower Volume Press the Volume - button.
The following buttons on the right control unit are
used for phone call functionality:
Function Action
Press the Multi-function
Answer or end call
button once.
When incoming call occurs,
Answer an
press the Multi-function button
incoming call
once.
When incoming call occurs,
Decline an
hold the Multi-function for
incoming call
2 seconds.
Switch between With two calls active, press the
two calls Multi-function button twice.
With two calls active, hold
Merge two calls the Multi-function button for
1 second.
While on a call, press the Multi-
Toggle mute
function button three times.
2.3 Status Indicator
The status LED indicator is located on the
right control unit, Diagram 3 explains the
illumination states.
Diagram 1
Power button functionality
L
Noise cancelling
Power
Diagram 2
Headphone controls
Illumination Operational state
White Battery charge > 30%
Amber Battery charge between 30% and 10%
Red Battery charge < 10%
Red flashing Battery charge insufficient for headphone operation
Blue flashing Pairing mode enabled
Blue (2 sec solid) Pairing successful
Blue flashing (calls) Incoming call
Green flashing Rapid charging
Green solid Battery charge full, trickle charging
Diagram 3
Status indicator illuminations
L
R
Volume -
Multi-function
Volume +
3