Eaton Electrical 3S350 External UPS Ease of use: plug-and-play capability - features HID-compliant USB port for automatic integration with Windows, Mac and Linux (no drivers required) Eco Control for 30% greater energy savings than a typical battery backup Attractive design and glossy finish make the 3S a perfect fit for the modern office environment Up to 8 receptacles - (4) battery backup and surge protection, (4) surge protection Data line protection for telephone, fax and Ethernet devices