Introducing the Extech GRT300, the ultimate non-contact voltage detector with advanced features that surpass the competition. Its patented tip design provides superior sensitivity and accuracy, detecting voltage from 12 to 1000V AC. The bright LED display and audible alarm instantly alert you to the presence of voltage, ensuring maximum safety. With its compact size and rugged construction, the GRT300 is the perfect tool for electricians, homeowners, and professionals alike.