Specification: Product Size: 8.7cm Item Type: Electric Induction Pen Model: TA881A Non-contact induction voltage range: 12-1000V, 50/60Hz Operating temperature: 0 -40 Storage humidity: -10-50 Storage humidity: 95% Elevation: 2000meters Power Supply: 2 x 1.5V AAA batteries (not included) Package List: 1 x Induction Electric Pen The product supports the detection of zero and shot line, simple operation and clear display The electric pen comes with sound and light alarm, quick alarm sound and light flashing Press long press the blue button to turn on the flashlight lighting, which is convenient to easily measure in the dark environment After about 3 minutes without induction signal or operation, the tester will turn off automatically. When the battery voltage is low, the tester sensor light will turn on once and then automatically turn off Under normal circumstances, when a bright red three-segment analog signal, the pen electric detects line of fire; When a bright green three-segment analog signal is inside, the electric pen detects a zero or ground line