The double prompt design of the buzzers screen allows users to detect changes in condition during detection, making it more suitable for a wide ranges of environment It can still be clear and loud in noise environment, making it for home users and professional electricians to use Not voltages detection, supporting a ranges of AC12V-1000V, to avoid the risk of electric shock caused by direct for users The device can automatically shut down after 5 minutes of inactivity, extending battery lifespans and maintaining a standbys at any time Solved the problem of frequent battery replacement, suitable for long time project and outdoor operations It includes functions such as live / neutral line recognition, breakpoints search, and more, meet different electrical detection needs, and multifunction device can complete multiple tasks The measurement accuracy reaches ± 5% +3, and the display of voltages condition help users quickly identify circuit problems Specially suitable for electricians and maintenance personnel, improving work efficiency and reducing troubleshooting time, Manufacturer: Ldabrye