Features: The intelligent waterproof tester pen has a high sensitivity sensing function, which can quickly detect whether the voltage of electrical equipment exists and alert users in times. The product adopts non contact designs, and the user can detect the voltage only by putting the tester pen close to thesurface of the measured object, thus avoiding the potential safety hazard caused by direct contact. The product is equipped withdigital display screen and acoustooptic alarm function. When the voltage is detected, the voltage value will be displayed on the screen, and an alarm will be given by sound and flash to remind users to pay attention to safety. It is waterproof, suitable for use in wet environment, and ensures the stability and reliability of product. Small and light, easy to carry, can be put into a pocket or toolboxs for use at any times. It is suitable for electrician maintenance personnel, home improvement engineers and other professionals to detect whether the voltage of indoor circuits and sockets is normal. It is suitable for home users and can be used for daily small electrical appliance maintenance and simple circuit detection. It is suitable for the electrical installation and debugging stage of constructions site, and can quickly detect the voltage of wires and cable to improve work efficiency. Specifications: Material:ABS, Electronic Component Size:As Picture Shown Color:Black Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Electric Tester Pen