LED light and low voltage indicator - The flashing light of the low voltage LED and alarm can remind you to replace the battery in time, while the white LED light can even work in the dark environment; automatically power off after 5 minutes of operation to save energy Safety sound and light alarm - voltage frequency can be distinguished by beep and LED Non-contact voltage tester - When the device approaches AC voltage within the specified voltage range, it will flash and beep without touching the object under test, and will also emit drip sound and LED indication to support adequate safety. Measurement application Different voltage test and dual range test - Distinguish real-time and neutral line by alarm sounds of different frequencies; The default AC voltage measurement range is 48-1000V, and 12-1000V can also be measured by adjusting the sensitivity. This satisfies the need to select the most appropriate sensitivity before testing on different occasions and on different objects. AC voltage range: 48V-1000V / 12V-1000V Frequency: 50Hz / 60Hz Alarm mode: sound and light alarm Voltage level: low, medium, high Flashlight: Simultaneous LED lighting Low voltage indicator: Yes Power: 2 x 1.5V AAA battery Product size: 6.1 x 0.8 x 0.8 inches Security level: CE CAT. III 1000V / CAT. IV 600V Operating temperature: 0-40 ° C Storage temperature: -10-50 °C Altitude: <2000