Get the inside scoop with the SpyNet Bionic Ear. Short of developing x-ray vision, this swish listening device is the best tool around for finding out what"s going on behind closed doors. Place the bionic ear on a door, wall or window and audio vibrations will wing their way through the unit into your ear piece. It"s the ultimate accessory for any secret spy agent. The SpyNet Bionic Ear requires three AAA batteries (not included).