Package List: 1 * Voltage Tester (without battery). This AC voltage pen tester ranges from 12V～1000V and 48V～1000V sensitivity, all your family's electrical appliances can be tested by it. It uses non-contact method, so there is no need to worry about any possibility of electric shock. Detect AC voltage by contacting the power outlet or getting close to the live wire with a non-contact tip. You can use the non-contact voltage detector in circuit breakers, lighting fixtures, switches, sockets, wires and anywhere you need, the tester pen also acts as an emergency flashlight that can illuminate the working area. The tester pen also acts as an emergency flashlight that can illuminate the working area. Product Description Voltage Tester Specifications: Dual Sensitivity AC Voltage Range: 12V～1000V (High Sensitivity) / 48V～1000V (Low Sensitivity) Frequency: 50/60Hz Alarm Mode: Sound and Light Alarm Backlight: Red and Green Dual-Color Backlight Flashlight: White LED Light Auto Shutdown: Yes