Allegro Medical
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It did not work at all
It did not work at all. Maybe it works on some specific kinds ot phone receivers, but it clearly does not work on the phones here. At all. Would do well to specify WHICH kinds of receivers this works on. To be specific, we were unable to make out human language when the device was attached to the receiver - voice was garbled. And when we turned up the volume, there was so much feedback, we just could not hear anything. It did not work on any setting.