Tripp Lite 550VA 300W Line-Interactive UPS - AVR - 8 Hour Recharge - 2 Minute Stand-by - 120 V AC Input - 110 V AC, 115 V AC, 120 V AC Output - Single Phase - Pulse-width Modulated Sine Wave - USB - 8 x NEMA 5-15R - 4 x Battery/Surge Outlet (AVR550U)