Bosch GMS 100 M Professional Information The Bosch GMS 100 M Professional is a professional-grade metal and cable detector that is designed for use in a variety of applications, including construction, electrical work, and DIY projects. The detector features a calibration-free design for maximum reliability, an automatic zoom scale for more precise detection, and the ability to detect ferrous metals, non-ferrous metals, and live cables. Introduction The Bosch GMS 100 M Professional is a versatile and reliable metal and cable detector that is ideal for a variety of applications. The detector features a calibration-free design, which means that it does not need to be calibrated before use, ensuring accurate results every time. The automatic zoom scale allows users to zoom in on specific areas for more precise detection, and the ability to detect ferrous metals, non-ferrous metals, and live cables makes it a valuable tool for a variety of professionals.