An apparatus for generating EUV radiation is disclosed which may include a target material, a system generating a laser beam for interaction with the target material and a pair of electrodes. The use of such devices, methods, and computer readable mediums storing a program allows the user to interact with devices through the use of multi-touch displays. In some embodiments, two and only two electrical contact engagement portions are provided thereby simplifying electrical contact. The server processes the requests and sends confirmation messages back to the unit via the gateway when a request is completed or other information needs to be sent to the unit. The microcontroller uses the frequency of the pulses to determine the load on the motor. The device comprises an elongate body having a distal anchor thereon.