NVX XTGSP2 Tone Generator & Speaker Polarity Tester, 0�8V Output, 13�10,000Hz Variable Tone, RCA & Alligator Clip Leads, Auto Shutoff, Level & Frequency Controls for Audio System Setup
 
Product Features
  

         
It features an auto-shutoff for extended battery life; It is a very small size, making it easy for handheld use, and is also designed with rotary control knobs for easy tone and level adjustments
         
Perfect Troubleshooting and Testing
         
Speaker Polarity Tester
         
Includes RCA and Alligator Clips