Product Details: Mobile Audio Relay and Battery Isolator. Great for isolating a second batter making it dedicated to the stereo system. Does not create a voltage drop to the second battery like conventional isolators. 500 Amps at 12V Continuous Power Handling. 700 Amps Surge Power Handling. Switching Power: 10 - 16 VDC. Draws Less Than 1 Amp When On. Authorized Internet Dealer. 1-year Manufacturer's Warranty. | Nvx | | BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats. | Best Buy