Introducing the Wadfow Automotive Circuit Tester – your reliable tool for voltage testing. With CAT. III 300V rating, Pollution Level 2, and altitude readiness up to 2000m. Operating in 0~40 C, it’s your ideal companion. The pocket-friendly design, anti-slip screwdriver bit, and robust craftsmanship ensure convenience and durability. Get accurate readings with a 3 times/sec sampling rate. Powered by 1.5V AAA batteries.