Security: The non-contact voltage tester is certified to III 1000V IV 600V testing. When the AC test pen detects voltage, the probe will flash red and beep. The higher the detected voltage, or the closer to the voltage source, the higher the beep frequency of the dual-range voltage detector. The AC outlet tester detects yellow flashes for low voltage and neutral triggers, red flashes for high voltage and live triggers Non-Contact: The AC circuit tester uses non-contact to measure voltage, using the NCV induction probe to detect AC voltage, just press and hold The tip of a circuit tester is inserted into an outlet or power cord to detect the presence of voltage. Dual range circuit voltage tester is safe and double insulated, you don't have to worry about electric shock, voltage detection tool is safe and perfect to help determine neutral point or live and breakpoint testing Dual range: current tester detects standard voltage and low voltage range (12- 1000V AC / 48-1000V AC), making the measurement more flexible and accurate. NCV sensitivity automatically adjusts from low to high. Low sensitivity can detect doorbells, thermostats, power strips, etc. High sensitivity is very suitable for detecting power supplies, etc. When the voltage test passes, use a non-contact wire tester where needed. The visual and audible voltage indicator circuit inspection tester is carefully designed with a bright LED light to help you work properly in your environment, and the AC cable voltage tester is equipped with a light spot positioning function for indicating long distance lines. When the battery of the voltage detection tool is lower than 2.4V or the current detection pen does not work for 5 minutes, it will automatically shut down to save energy. Pocket voltage test pen with pen hook, easy to carry and efficient: The live voltage tester can be used to test lighting fixtures, switches, sockets and other places needed, just press and hold the red button for 2 seconds. The dual-range test pen is ideal for electricians and home users. When the voltage exceeds 90V, the socket voltage detector will issue a high-voltage alarm and a safety message will be displayed on the screen. The NCV probe voltage detector is an effective tool to help with home appliance repairs and circuit testing. Color: Black Material: Plastic Package contents: 1 x voltage test pen Only the above package contents, other products are not included. Note: Light and different monitors may cause the color of the item in the picture to be slightly different from the actual thing. The measurement allowance is +/-1-3cm.