Intelligent Waterproof Buzzer Voltage Tester Pen Power Voltage Detector Electricity Detector Test Pencil with High Brightness LED Light Electrical Indicator Tool with Screwdriver material is insulation and resistant to falling, safer to use. Low voltage, pen lights green; High voltage, electric pen buzzes. With self checking function to know whether pen battery works on or not. LED indicate light, long service time and convenient to view detection . A perfect tool kit for home and electric industry uses. nib is designed with a screwdriver, which is convenient for you to open socket box at any time. Pen clip design, size and light weight for easy carrying. It is easy to detect fire/ line and know which line has a bad situation. Specifications: Color: transparent Measuring : 70-250V Battery: 3 * LR41, 1.5V, 25mAh Package size: 185 * 70 * 30mm / 7.3 * 2.8 * 1.2in Package weight: 30g / 1.1ounce Quantity: 1pcs Material: PC+metal Screwdriver size: 17 * 4mm / 0.7 * 0.2in Item length: 155mm / 6.1in Packing List: 1 * Voltage Tester Pen The nib is designed with a screwdriver, which is convenient for you to open the socket box at any time. With self checking function to know whether the pen battery works on or not. A perfect tool kit for home and electric industry uses. LED indicate light, long service time and convenient to view the detection result. Pen clip design, mini size and light weight for easy carrying.