Amprobe DRS-1 Digital Clamp-On: This versatile tool measures AC current, AC & DC voltage, and resistance. Its large LCD display and manual ranging make it easy to read and use. With a maximum jaw opening of 1.50" (38mm), it can accommodate conductors up to 1.26" (32mm) in diameter. The DRS-1 also features a continuity beeper and a data hold function for added convenience. Its rugged construction and safety features make it ideal for a variety of electrical applications.