Here's some information about this product:
Functionality:
It's designed for quickly and safely checking for the presence of AC voltage in electrical systems without direct contact, reducing the risk of electric shock.
Features:
The Testo 745 includes a built-in low-pass filter to minimize high-frequency interference, a two-stage sensitivity setting for phase detection and voltage indication, and an integrated LED flashlight for working in dark environments.
Safety Ratings:
It is rated to CAT III 1000 V and CAT IV 600 V, and is waterproof and dustproof according to IP 67 standards.
Usage:
It can be used to determine voltage or de-energization, and indicates the presence of voltage through clear visual and acoustic signals.