Check the listing for details. LCD Screen Non-Contact Sensor Tester Pen Digital Intelligent AC Voltage Meter. Color: Blue, Condition: New. Listed at 4.98 USD. Flashlight/Backlit Screen: Press the second button to turn on the flashlight lighting/HD LCD backlit screen. No longer be afraid to see the screen value in the dark. Breakpoint Detection: Detection along the line, where there is no breakpoint, there is a buzzer signal full grid, where the breakpoint is only 2 grids and no buzzer.