┲One-Key Lock Radiation: Data retention, one-key lock to max/average for easy viewing. It can measure magnetic field radiation and electric field radiation, effectively identify signal sources, and locate signal locations. Automatic shutdown after 5 minutes of inactivity. ┲Easy To Read: LCD backlight allows you to have clear vision. The built-in magnetic radiation sensor of the radiation detector displays the radiation value on the LCD screen after the chip is processed. ┲Auto Sound And Light Al