She kept two flashlights in the window to act as a panic signal.

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Have to prop my phone in the window and even then not guaranteed a signal.

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We tested the device indoors -- located near a window, it picked up a GPS signal easily, and transmitted its location to a map within the iOS app even as we walked 100 or so feet away, past several walls.

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The signal was transmitted hundreds of feet through the window to the router in the dining area, then to a flat-screen Panasonic LED television, without a break in the action.

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So to test it I placed the router by the window in the bedroom where I can never get a good signal in the wee hours of the night.

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