A user interface device for use in controlling one or more external devices has at least a positional change operation mode and a keyboard operation mode. The user interface device has a main body portion, an orientation sensor, a surface sensor, a processor and a switch. The main body portion includes a top surface having at least one button that is active only in the positional change operation mode. The at least one button triggers an action in the one or more external devices when pressed. The bottom surface has a displacement sensor and a thumb keyboard. The displacement sensor detects positional change of the user interface device only during the positional change operation mode. The positional change is used for navigation on a display screen of the one or more external devices. The thumb keyboard has a plurality of keys that generate keyboard signals for sending to the one or more external devices only when the user interface device is in the keyboard operation mode. The plurality of keys allow for entry of at least alphabetic characters. The orientation sensor detects the orientation state of the user interface device. The surface sensor detects whether the bottom surface of the user interface device is touching an external surface. The processor includes processor logic that receives input signals from at least the orientation sensor and the surface sensor, and uses the input signals to determine whether to place the user interface device in either the positional change operation mode or the keyboard operation mode. The switch is configured to place the user interface device in either the positional change operation mode or the keyboard operation mode.