A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. The medical device can include a composite cover formed of a deposited metallic film and one or more polymer layers. The gear control incorporates at least one power device connected to the gear lever, a position reader designed to detect the position of the gear lever, and a control unit designed to control the power device on the basis of the position of the gear lever so that movements of the gear lever are only allowed along a particular path which is defined by a control unit containing software.