This tester pen is suitable for electricians, maintenance personnel, enthusiasts, and anyone who frequently needs to circuits The red and green voltage tester pen is a must have tool for quickly checking the circuit is live, enhancing work efficiency and Improve your work efficiency and with this red and green voltage tester pen Say goodbye to the hassle of uncertain circuit conditions and confidently tackle any electrical task It can be widely used in various circuit testing scenarios, such as sockets, switches, and outlets, in homes, offices, and more With its red and green indicators, this tester pen allows users to easily determine the condition of the circuit Its compact size and portability make it for carrying and using, Manufacturer: Kaeltsyn