The Salary Smoke Leak Detector S-SD301-YE is a monitoring device designed to detect smoke leaks, specifically manufactured by Solary. With a manufacturer part number of SD301, this leak detector is a valuable tool for diagnosing and pinpointing potential issues in automotive systems. Its compact and easy-to-use design allows for quick and efficient detection of smoke leaks, making it a reliable and essential diagnostic service tool for automotive maintenance and troubleshooting. Box open and may have been tested.