Abstract: The present invention provides a mobile unit (e.g., phone) for wireless communication that includes an antenna for detecting wireless fidelity (Wi-Fi) signals from a local area network and logic for switching the unit's operation from conventional cellular transmissions to Wi-Fi transmissions (i.e. 802.11) upon detection of Wi-Fi signals. The handheld device can communicate with a Public Switched Telephone Network (PSTN) using Voice Over Internet Protocol VOIP. In one embodiment, the logic for performing the switch to Wi-Fi transmission is programmed into a subscriber identity module (SIM) card in the device and can perform the switch automatically or in response to manual input after prompting the user. Memory and code in the mobile unit measure and store the duration of both cellular and Wi-Fi transmissions by the mobile unit.

Abstract: The present invention provides a lightweight headgear mountable protective face shield capable of protecting substantially the entire face of a human wearer from ultraviolet radiation. The face shield comprises an articulated shielding arrangement to be positioned in blocking relationship to the wearer's face. The shielding arrangement comprising a plurality of segments extending across the wearer's face, the ends of which are preferably pivotally connected to hinge plates positioned at either side of the wearer's head. The hinge plates are attached to a securing mechanism which secures the face shield to an article of headgear. In a preferred embodiment, the face shield is detachably secured to the forwardly projecting bill of a baseball style cap by a securing mechanism comprising a pair of jaws between which the bill is secured by clamping.