A photoelectric voltage tester is a device that uses light-emitting technology to visually indicate the presence of electrical voltage, providing a safer way to detect live wires.
The inductive electric pen detects voltage without direct contact with the electrical conductor. It uses electromagnetic induction to sense the presence of AC voltage.
Zero live line detection ensures that the tester can identify whether a line is live or not, providing extra safety by indicating when there is no electrical current present.