APC Back-UPS ES series Uninterruptible Power Supply (UPS) battery backup and surge protector.

This specific panel houses the data communication and data line surge protection ports designed to shield peripherals from electrical spikes traveling through standard communication lines. • Labeling: The ports are marked as Wall Outlet, DSL/Modem/Network/Fax, and Equipment. • Function: These ports act as inline surge suppressors for telephone lines, DSL connections, or Ethernet lines. • How to use: You connect the incoming line from your wall jack to the designated input port, and then route a second patch cable from the output port to your phone, modem, or computer. If a lightning strike or power surge hits the external lines, the built-in varistors absorb the high voltage before it fries your equipment. • Emergency Battery Backup: If the electricity in your home goes out completely, this device instantly switches to its internal battery. This gives you enough time to save your work and safely shut down your computer, or keeps your internet running for a while. • Surge Protection: It acts as a shield against sudden power surges or lightning strikes that could permanently fry your sensitive electronics. MAKE AN OFFER!! PRICE NEGOTIABLE!!