Please find below a list with supported 3rd party devices for Gigaset Maxwell 10.
All tests were performed by the Gigaset pro support team.

USB Webcam

Brand	Model
Logitech	Webcam C930e

All those devices work under Android 4.2.2 http://www.ideasonboard.org/uvc/#devices

HDMI Display

Brand	Model
Samsung	S22C350H

Brand	Model
Logitech	Illuminated Keyboard

Brand	Model
Logitech	K400
Samsung	BKB-10

Brand	Model
Logitech	Bluetooth® Illuminated Keyboard K810

USB Stick

Brand	Model
Sandisk	Cruzer USB 32 GB
Kingston	Data Traveler SE9

External HDD

Brand	Model
On Memory	Core 1TB, 2,5 Zoll

Brand
Baudisch
2N