Feature: 1. Intelligent Identification: Power on test, intelligent identification ; Simple operation and no contact is safer; Upgrade anti interference measurement more accurate 2. Use Way: When measuring the line of fire all indicate the red light on; The alarm indicator light flashes simultaneously; The buzzer sounded an urgent alarm 3. Easy Use: Breakpoint search using induction pen to identify the principle of electric field signal; Slowly search along the route to quickly find the fault breakpoint 4. Accurately Measure: Upgrade intelligent chip to automatically filter interference signals; Accurately measure 5. Low Power Consumption: Low power LED high light beads with concentrator lens; Auxiliary lighting in blackout or dark environment Specification: Item Type: Electric Test Pen Model: HT90 Material: ABS Battery: 1.5V 2 x AAA(Excluding) Purpose: Circuit Detection Detection Voltage: Ac Voltage: 12-1000V, 50/60hz Application Environment: Operating Temperature: 0-40℃ Storage Temperature: - 10-50℃ Humidity: ≤ 95% Altitude: ≤ 2000m. Package List: 1 x Electric Test Pen1 x User Manual Note: The device is delivered without batteries