37660 Panamax M4LT-EXMAX 2 TEL Home Office Protection Protect or Disconnect Circuitry safeguards equipment against all surges. In the event of a catastrophic surge such as lightning, it completely disconnects AC power to connected equipment Signal Perfect Circuitry offers optimized signal line surge protection to ensure a clean clear signal Three diagnostic lights for safety feature protection OK, ground OK, and line fault lights to keep you informed of AC outlet status