This General Radio Co Type 1551-A Sound-Level Meter is a top-of-the-line device for measuring sound levels with precision. It is designed for use in various industries, including business and industrial settings, as well as in the test, measurement, and inspection field. The meter is made by General Radio Co., a trusted brand known for producing high-quality audio equipment. With its advanced features, this sound-level meter is an essential tool for professionals who need to measure sound levels accurately. It is perfect for use in testing the noise levels of various devices and equipment, and it is also ideal for use in acoustics and sound engineering. Whether you are a professional or a hobbyist, this General Radio Co Type 1551-A Sound-Level Meter is a must-have item for anyone who needs to measure sound levels with precision.