AC10A AC/DC Voltage Detectors Smart Non-Contact Tester Pen Meter 12-1000V Current Electric Sensor Test Pencil Warning: Avoid potential electric shock or injury: If the power indicator light is on after the product is powered on, do not use it! Before use, test on a known live power source to ensure that the product is in good working condition When using this product, even if there is no sound or light alarm, there may still be voltage present. The tester only indicates the effective voltage when there is an AC voltage that generates sufficient static electricity field! If the electric field intensity is very low, it may not be detected, and the tester may be affected by the following factors, including but not limited to: Shielded wires/cables, thickness and type of insulation layer, distance from high voltage sources, complete insulation layer, differences in power socket design.... If the tester is damaged or unable to function properly, do not use it! Before use, check the product probe for cracks or fractures. If there are any problems, do not use it! Do not use this product to detect rated voltage beyond the product range, as it will directly damage the product! When testing AC voltages above 36V, please take safety precautions to prevent electric shock hazards! AC voltage range: S light off: 48-1000V/ S light status: 12-1000V Frequency: 50Hz/60Hz Alarm method: sound and light alarm Flashlight: white LED illumination Automatic shutdown: supported Battery undervoltage reminder indication: supported Zero line/live line recognition: Based on signal strength, signal strength=live line, signal weakness=zero line NCV sensitivity: automatically identifies sensitivity (H, M, L) in 3 NCD sensitivity indicator light: The tester indicates high/H, medium/M, low/L through different frequency alarm sounds and different color LEDs, Operating temperature: 0-40 Altitude: 2000m Battery type: 2 * AAA battery (not included) Product size: 162.9 * 22.2 * 28.3mm Socket: Not using S high sensitivity function: Zero line test: The H green light flashes and the buzzer sounds intermittently. Live line test: H, W, L three level red light, continuous sound of buzzer. Socket:Using the S high sensitivity function: Zero line test: The H green light flashes and the buzzer sounds intermittently. Fire line test: The red light flashes in H, W, and L gears, and the buzzer sounds continuously. Breakpoint testing: No breakpoint test: Three gear full red light, continuous sound from buzzer Breakpoint test: From the H red light to the green light, the buzzer sounds intermittently. _x000D_