The APC Back-UPS CS 500 Battery Backup BK500 is a reliable desktop/freestanding UPS designed for power protection in personal and small office environments. With a maximum power output of 500W and 6 outlets, this uninterruptible power supply provides a stable and secure power source during outages or fluctuations. Its features such as an audible alarm, surge protection, and noise filtering ensure a smooth and safe operation for connected devices, making it a practical and efficient solution for preserving productivity and preventing data loss.

In good condition. According to the unit and it's self-reported condition, it is in good working order. It is supposed to give a user at least three minutes to save one's work and turn off machines that are still running while also providing protection from surges and other potential anomalies they are capable of damaging machines other than those plugged into its six sockets (3-prong.)

On the front of the unit, it has light indicators for being "On Line" "On Battery" "Overload" and "Replace Battery"

Thank you for reviewing this listing. I am not an expert with these systems. All information is accurate to the best of my belief and understanding given the information and conditions available. I have no way of testing the batteries inside or other functionalty.