A transmission system and a method for controlling the transmission system comprising at least one interface unit and at least one adjustable device are disclosed. One embodiment provides a detector decoy email account to serve as generic bait for malicious software for a domain within the trusted network. A first module may be deployed at a predetermined position in the wellbore; a cable attached to a second length of tubing; and one or more second modules attached to the tubing and coupled inductively to a resistive load. A back bias voltage control circuit can also be used to control the threshold voltage of a transistor in series with a resistance load to reduce power usage. In some embodiments, an external thermally conductive panel of the display device is thermally coupled to components of the power supply through a low thermal impedance interface.