APC® Battery Backup, Standby, 120 VAC Input, 120 VAC Output, 500 VA Power, 50/60 Hz Frequency, 15 min Half Load/4 min Full Load Backup, 1 Phase, 6 Outlets, (3) Battery Backup/(3) Surge Protection Outlet, NEMA 5-15P Plug Configuration, NEMA 5-15R Receptacle Configuration, 6 ft Cord Length, Floor Mounting, Simple Signaling RS232 Cable/USB Interface, Lead Acid Battery, Environmental Conditions: 32 to 104 deg F Temperature, 0 to 95% Relative Humidity, 24000 Btu/hr Online Thermal Dissipation, 6.5 in H x 3.6 in W x 11.2 in D Dimensions,