This is Tinusaur Continu – Continuity Tester Gen:1 mk-II
What is a Continuity Tester?
A continuity tester is a simple electrical testing device used to check the continuity of an electrical circuit. It is a handheld tool commonly used by electricians, technicians, and DIY enthusiasts to verify whether there is an uninterrupted path for electrical current to flow through a conductor or a circuit.
Expect more information soon.