Advanced semiconductor sensor, which for w/ fine sensitivity and quick responsibility, simple and convenient to use. It will show the final test result in digital and cartoon mode, everyone can be verified by this tester. 5 result levels: very good, normal, not lousy, bad, very bad. Digital LCD and cartoon indication for w/ orange backlight, save energy and environmental for protection, for w/ soothing colors and will not hurt your eyes. Quick response and resume, for w/ self-checking to show different conditions., Manufacturer: Kalttoy