1. Adopting NCV induction probe, the voltage tester enables you to detect voltage without any contact which largely avoids electrical shock and ensures your safety, you only need to put the tip of the detector near an outlet or power cord. EN rated CAT III 1000V CAT IV 600V, meets requirements, the electrical tester is safely double insulated so that you can rest to use it. 2. The non-contact voltage tester adopts dual and switchable sensitivity (AC 12V-1000V / 48V-1000V), LOW is perfect for detecting doorbells, thermostats and power strips, while HIGH is perfect for circuit systems such as power supplies. The voltage strength will be shown as 1~6 level, allowing you to detect the live or neutral wire easily. All Electric Appliances in Your Family can be Tested by it. 3. Besides Large LCD display, audible and visual alarms are also available. The higher voltage the tester detects, or the closer the tester approaches the voltage source, the louder and more frequent alarm sounds. The green light blinks indicating low voltage while the red light indicates high voltage. This voltage detector is an effective electrician tool to test circuit break-point and help home appliance repair, suitable for both electricians and home users. 4. Compared to most common voltage testers, our electric tester is designed with a function of measuring ambient temperature, enabling users to hazardous situations. Meanwhile, the flashlights at the forefront and of the tester help you have a better understanding of the environment in darkness. 5. The voltage tester pen with pocket-size and clip is convenient for carrying. Plus, automatic power off after 5 minutes without operation or signal detection to conserve and extend battery life. Colour:black Material:ABS Package Contents: 1 x Electrical Tester Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.