Features of your DTK-2451 and DTH-2452

1	Four ExpressKeys: These buttons are used to activate settings and to customize display settings in the On-Screen Display.
2	Status LED: The Status LED lights blue when the pen tip comes close to the surface or when you press the pen button. Power LED The Power LED is blue when the pen display is on and a video signal is present. The Power LED is orange when the power is on but no video signal is present. The Power LED is off when the pen display is off.
3	Power button: This is located on the back edge of the device.
4	Ports that you use to connect your device: DVI IN USB-B Power cable
5	Extra ports: DVI OUT: You can use this to add another display to your device. USB-A: You can use this to add a peripheral device, such as an external hard drive.

Mode toggle		Use this button to toggle what the ExpressKeys do. Press the button so that you can use the ExpressKeys to customize display settings. Press the button again so that you can use the ExpressKeys to activate the settings assigned to them.
Pen holder and slot		Insert the pen holder into the pen holder slot on either side of the device and use it to store your pen.
Pen tether points		They are located under the pen holder slots. Insert the end of the pen tether through the holes. Then, slip the pen through the loop to attach it to the side of your pen display.
Display stand		Unfold the display stand to use your device in landscape orientation. Note: You can use the device in portrait orientation but not with the stand.