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 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 Not voltages detection , supporting a ranges of AC12V-1000V , to avoid the risk of electric shock caused by direct for users 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: ERRORY