Feature: 1. DETECTOR PEN: The electricity detector is pen shape design, comfortable to hold, convenient to use and carry, which is convenient and practical. 2. EASY OPERATION: Just touch the terminal block, plug or power cord with the tip. When it turns red, it will beep, indicating that there is voltage. 3. LED INDICATOR: When there is no voltage, the white LED is always on, and the red LED flashes, indicating that there is voltage, convenient to use. 4. WIDE APPLICABLE: The electricity detection pen is suitable for testing power cables, circuit breakers, wall sockets, junction boxes and fuses, etc. 5. APPLICABLE PEOPLE: Electricians, maintenance, service, safety personnel and owners can quickly test active circuits in the workplace or at home. Specification: Item Type: Electricity Tester Material: ABS Insulation Plastic Size: Approx. 15.2 x 2.2 x 1.7cm / 6 x 0.9 x 0.7in Frequency Range: 50-500Hz Test Voltage Range: 90-1000V AC Safety Level: Class II 1000V Power Supply: 2 x AAA Batteries (Not Included) Scope of Application: Test Circuit. Package List: 1 x Electricity Tester