Introducing the Tempo 551™ Advanced Underground Locator – the Professional Grade, All-in-One Location Solution. Designed for professionals and packed with advanced features, the 551 brings you everything you want in a Locator including; dual simultaneous frequencies, Peak & Null receiver, and IntelliTrack™ digital noise rejection. The proprietary IntelliTrack™ digital noise rejection technology offers signal clarity in noisy environments to give you an effortless locating experience that’s smarter, faster, and more accurate.