Non-Contact Voltage Tester (12V-1000V) Details : – Auto Power Off – Low battery indication – Live/Null Wire Distinguish: Automatically distinguish the Zero line and Fire line with sound (High, Medium,low) and LED light. – NCV Sensitivity: Automatic selection of 3 kinds of sensitivity ( High,Medium,low) Voltage Sensitivity: 12V to 1000V AC – Frequency: 50-500Hz – Alarm Mode: Sound and light Flash – Light: White – Operating Temperature: 32 to 122F (0 to 50degree) – Storage Temperature: 4 to 140F (-20 to 60degree) Humidity: < 85%RH – Authentication: CE CAT.III600V RoHS – Battery: 2 × 1.5V AA Batteries (batteries are NOT included) – Dimensions: 160mm x 20mm x 25mm How to use: AC non-contact voltage testers are easy to use – just touch the tip to a terminal strip, outlet, or supply cord. When the tip glows red and the unit beeps, you know there is voltage present. Can quickly and easily test for energized circuits. Just press the button, white LED light can be always on when there is absence of voltage “Beep” sound and red flashing LED would indicate the presence of voltage