Display Bargraph Range of voltage detection high sensitivity:AC12~1000V;Low sensitivity:AC48~1000V frequency 50/60Hz Alarm mode Sound and light alarm Probe shape Prolate shape Backlight Red and green double color backlight Live and Neutral According to backlight color change: green is neutral wire; red is live wire. Signal intensity display Four level sensitivity of bargraph Signal intensity indication method sound from slow to fast;backlight from green to red;bargraph from low to high Flashlight Yes. Auto power off No operation, no sensing signal will shut down automatically in about 3 minutes. Low-battery indication Power Supply 2x1.5V AAA batteries Weight Approx. 45g Size 155mm x 20mm x 20mm Safety rating EN61010-1,-2-030;EN61326-1,CAT III 1000V Dual sensitivity mode (12~1000V & 48~1000V) Self-test function when power on (beep and red light) LCD screen indicator (battery low, 4 level of sensitivity, AC signal) Low power consumption