摘要：

A system including a first device comprising a first radio communications unit, a video camera, and electronic computer means, and a second device comprising a second radio communications unit, video display means and electronic computer means, wherein the first device is adapted, upon receipt of a predetermined communication from the second device, to activate the video camera and to transmit live video data from the video camera to the second radio communications device, and wherein the second radio communications device is adapted to display the live video data on the video display means.

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