This product bundle includes two complementary APC battery backup power supply items to keep your electronics protected and powered during outages. The first component is an APC replacement battery compatible with select APC uninterruptible power supply models including the BR1500MS2. It is a genuine APC battery tested and certified to restore UPS performance. The second component is a 600VA/330W APC battery backup power supply. It has 7 total outlets - 5 providing battery backup power and surge protection, and 2 with just surge protection. There is also a USB charging port to charge mobile devices. This backup power supply is designed to supply safe power during outages and voltage fluctuations. With a replaceable battery, you can swap in a new genuine APC battery like the one in the first component when needed. Together these APC items offer reliable backup power and surge protection for home and business electronics.