Recoil MST-1 Multi function car audio tester distortion detector
This audio multi meter is an all in one tester packed with features. It"s not only a distortion detector, but much more giving you the ability to check RCA cables, test speaker phase,  frequency and more.  These are like a SMD DD1 + but has a better large color display and more features.
 
 
 
Features:
•        Output Range of 0-8 Volts 13Hz to 10k Hz Tone Generator
•        Distortion Detector
•        Speaker and System Phase Tester
•        Measuring of Constant DC Voltage up to 32V / AC Voltage up to 36V
•        Wire & Signal Cable Continuity Tester
•        Resistance Tester
•        LCD Display with Illumination
•        Built-in Rechargeable Lithium Battey
•        Auto Shutoff for Extended Battery Life
•        Control Buttons for Easy Tone and Level Adjustments
•        Includes RCA & Alligator Clips for Connection