The Extech DVA30 is a unique dual-function non-contact detector that identifies both AC voltage (12–600V) and AC current (200mA–1000A) without direct contact. Ideal for electricians and facility inspectors, it detects current through shielded cables, conduit, and metal enclosures—situations where voltage-only detectors fail. Features include sensitivity adjustment, bright LED and loud audible alerts, and pocket-sized portability with a clip for easy carry.