BIONIC SPY EAR COVERT OPS STYLE SOUND AMPLIFIER HEARING AID ENHANCEMENT ELECTRONIC DEVICE / Comes with a Spare Battery, New in a sealed Factory Package! Great for hearing Whispered, Muffled, and Hushed Conversations through Walls and Doors, a Handy Gadget for the Slightly Hard of Hearing, Birdwatching, Watching Television and not Disturbing Your Partner, and more..