The Listen Live WALL is a very different listening device. It enables you to listen through walls to monitor conversations, which designed for private investigator use.

This highly sensitive receiver comes with both a metal sonde to place against a wall, or a probe to place into a whole through a wall and can amplify noise by up to 2000 times and has a maximum sensitivity of -70dB, allowing it to listen through cement, steel, wood iron, glass and air brick.