Here's a Description of what you'll find in an APC Surge Protector.

Protection Battery-protected and surge-only outlets Reserves power
capacity and run time for connected equipment that require battery
back-up while providing surge only protection for less critical equipment
Power conditioning Protects connected loads from surges, spikes,
lightning, and other power disturbances.

Dataline Surge Protection Provides protection of connected equipment
from power surges on the data lines. Lifetime data recovery warranty
Provides peace of mind by providing professional data recovery
services in the event data is lost due to the failure of the unit.
Safety-agency approved Ensures product testing and approval to work
safely with the connected loads and within the environment.

Convenience Audible Alarms Provides notification of changing utility
power and UPS conditions. Automatic self-test Ensures early detection
of potential problems by periodic testing of UPS components. Cold-start
capable Provides temporary battery power when the utility power is out.

Hot-swappable batteries Ensures clean, uninterrupted power to
protected equipment throughout battery replacement. Resettable circuit
breakers Enables quick recovery from UPS overload events.
Transformer-block spaced outlets Protect equipment with input
transformer blocks without blocking access to other receptacles.
Manageability USB Connectivity Provides management of the UPS via
USB port.
Big Geek Daddy
How to Protect Your Computer from Power Surges
Big Geek Daddy's Tip to Keep Your PC Safe
Because PC's are expensive Big Geek Daddy recommends  
using a quality product from APC to protect it from electrical damage.