The field strength meter is a device used to measure the strength of an electromagnetic field. It is commonly used in various industries such as telecommunications, broadcasting, and electronics. The meter consists of a display screen that shows the field strength in units such as volts per meter or decibels. It also has an antenna or probe that is used to detect the electromagnetic field. The meter is typically portable and can be easily carried around for field measurements. It is an essential tool for professionals who need to assess the strength of electromagnetic fields in their work.