The WMMI211 Earth Listener with 5VDC is an electronic part with a wood-made case manufactured by Velleman, specifically designed to eavesdrop. It is an advanced material that can listen to Earth's movements and vibrations, such as groundshaking and remote sensing purposes. The WMMI211 Earth Listener is capable of picking up a wide range of frequencies from 1 Hz to 100 kHz. It is suitable for both aerial and close-distance listening. The WMMI211 Earth Listener includes an input port of 5V DC voltage, a simple one-button operation, a connection port for an antenna, and an output of signal or data. The WMMI211 Earth Listener also features a strong, durable, and high-quality wooden case which prevents damage and ensures perfect functionality. The WMMI211 Earth Listener ensures accuracy with a wide range of operating temperatures and is ideal for a variety of applications, such as seismographs, vibrometers, geophysical scientific studies, and industrial instruments.