Issues. This automotive meter also boasts an auto-off function to conserve battery life and a data hold function for convenience. Get your hands on the DUOYI DY2201C today and make your automotive repair tasks easier and more efficient! Meta Description: Discover the DUOYI DY2201C multi-functional automotive meter for professional auto detection and repair. With accurate readings and comprehensive functions, this handheld tool is a must-have for automotive maintenance.