https://www.bhphotovide
Specs:
-Output: 360W / 600VA
-Input: 120V
-4 x Battery-Powered, 4 x Surge Protected
-60 Hz +/- 3 Hz Output Frequency
-Recharge Time: 24 Hours
-Audible Alarm
-LED Status Display
-Cold Start / Hot Swap Batteries
-Delivers Battery-Powered AC