Introduction: Tenma took root in the consumer electronics service industry in the early 1980s and is a manufacturer that provides high-quality testing and measurement products as well as welding equipment. Tenma's product categories include power supplies, two and four channel oscilloscopes, desktop and handheld multimeters, voltage testers, clamp meters, and LCR instruments with various functions. Environmental testers measure sound levels to measure temperature, humidity, light, etc., probes, test leads, plugs, clips, etc., to be equipped with a large number of testing equipment. Welding equipment, cable testers for testing networks, audio-visual, computer, and data cables, as well as various frequency counters and audio generators. The services provided include equipment maintenance, installation, education, etc; Tenma official website: www.tenma.com.