Features: Intelligent Voice Broadcastlng: live voice broadcast function, measure real-time broadcast, make power measurement more convenient. Infrared Laser Positioning: it is more convenient to check the electricity in the room. Line Breakpoint Detection: the signal is weak, the beep is slow or no beep, which is the location of the breakpoint. Intelligent Zero Fire Line Recognition: quick detection of zero fire line, distinguishing and identifying according to the color of the light. 5 Sensitivity Adjustment: high sensitivity transparent sensor head, high protection level, durable, 12-1000V detection range. Clear Backlit Display: highlight the display, it is more convenient to read data, which is conducive to seeing the screen value clearly in a dim environment. Automatic Shutdown: if there is no operation and no voltage is detected within about 5 minutes, it will automatically shut down. Night Flashlight Lighting: let you no longer be afraid of not seeing the measured position in a dark environment, and eliminate the danger of electric shock. Specifications: Material: ABS AC Voltage Range: 12-1000V Frequency: 50/60Hz Alarm Method: Sound and light alarm + voice Zero Wire Recognition: Yes Auto Power-off: 5 minutes Power Supply: 2 * 1.5V AAA battery (NOT included) Item Size: 174 * 34 * 29mm / 6.85 * 1.34 * 1.14in Item Weight: 51g / 1.80oz Package Weight: 69g / 2.43oz Package Size: 21 * 3.8 * 3cm / 8.27 * 1.50 * 1.18in Package List: 1 * Test Pen 1 * Manual (English)