This Dual-Range Non-Contact Voltage Tester automatically detects low voltage and standard voltage. A bright green LED will tell you the tester is working and also functions as a work light. The light flashes red and two distinct warning tones sound when either low or standard voltage is detected. Red LED illuminates with warning tone when voltage is detected. Conserves and extends battery life with auto power-off feature. Detects non-contact of low voltage-Inch irrigation systems. Auto power-off feature conserves and extends battery life. CAT IV 1000 Volt rating provides expanded operation and protection. Lightweight, durable polycarbonate plastic resin construction; convenient pocket clip. 9.8 ft / 3 m drop protection. Safety Rating: CAT IV 1000V. Conforms to CE requirements. For more than 160 years, has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.