ByteBrother Low Voltage Pro 1 LVPRO1 from ByteBrothers is the perfect launching pad into the LVPRO family. It is fully upgradeable to the more expensive Models 2 and 3. With ByteBrother's superior accuracy that meets all low voltage installation demands this device. Cable Test Pack - Wall Jack ID - Speaker 7.1 ID - Speaker Pop -Port Blink - Toner Locator - Alert LEDs. 1 year warranty, Designed and Made in the U.S.A.