This Electronic Stethoscope is ideal for long-time observation without entering the room but to listen into it from the outside through solid structures. Where the human ear is inadequate the PKI 2360 Electronic Stethoscope makes audible what has previously seemed impossible. By means of the high sensitive contact microphone conversations and/or noises can be heard through walls, windows or any other solid material. Simply fix the contact microphone by the supplied mastic material to the best possible surface and listen directly with the headphone. The amplifier, equipped with Li-Ion batteries, volume control and socket for a recorder is built-in the special PKI headphones. The stethoscope sensor is directly connected to the headphones and allows the operator to use both hands for other activities.