Pen for Voltage Tester 12/1000-48V Test Pen Electrical Instruments Description Range of Measurement 12/48V to 1000V Qualities: 1. Range of measurement: 12V/48V-1000V 2. The buzzer alert 3. Adaptable sensitivity design; sensitivity can be changed between 12V and 48V. 4. An indicator of voltage signal strength 5. Weight of the product: 48g 6. Composition: metal and plastic