APC Back-UPS,300 Watts /500 VA,Input 230V /Output 230V, Interface Port Optional Simple Signalling RS232 cable, USB

Output
Output Power Capacity
300 Watts / 500 VA
Max Configurable Power
300 Watts / 500 VA
Nominal Output Voltage
230V
Output Frequency (sync to mains)
47 – 63 Hz
Topology
Standby
Waveform Type
Stepped approximation to a sinewave
Output Connections
(1) IEC 320 C13 (Surge Protection)     IEC 320 C13
(3) IEC 320 C13 (Battery Backup)     IEC 320 C13
(2) IEC Jumpers (Surge Protection)

http://www.apc.com/resource/include/techspec_index.cfm?base_sku=bk500ei