BE QUIET! Dark Base Pro 900 User Manual page 9

If the slider switch is subsequently reset to its first position "0", the PWM signal regains automatic control of
the fans.
Automatic PWM control of the fans requires cable "A" of the PCB panel (4.3) is connected to a PWM connector
on your MB. Lacking such a connection the speed of the fans connected can only be regulated manually.
DARK BASE 900
Dark Base 900 does not have automatic regulation.
The speed of all fans (PWM and 3-pin) connected to the PCB panel (4.3) are manually regulated using the slider
switch.
4.5 LED INSTALLATION AND USE (ONLY PRO-VERSION)
The LED illumination supplied can be freely positioned and installed in the case according to system
configuration using the attached adhesive strips.
To power them the lamps must be connected to socket "D" on the PCB panel (4.3).
Using switch "I" and switches the lamps on and off and permits the illumination color to be selected (red,
green, blue, white, orange).
4.6 QI Charger use (only Pro-Version)
The preinstalled Qi charger supplied with Dark Base Pro 900
allows cable-free charging of all external devices that are
compatible with the Qi standard. If the device (e.g. smartphone)
is equipped with such a feature it can be charged without cable
connection by placing it on the plate marked "J" on the Dark Base
Pro 900.
An acoustic signal will indicate that charging has started upon
laying the device on the charger.
In so doing please ensure you position the device carefully on the
center of the charging plate "J". The charging coil of the Dark Base
Pro 900 charging device is located in the middle of charging plate.