UPS provide RS232 and USB interface Pure sine wave overload protection LCD display  

pure sine wave UPS
UPS Model		LS-500D		LS-800D		LS-1000D
Capacity		300W		480W		600W
Input	Voltage	140-275V  AC
	Frequency	40-60Hz Adjustable
	Power factor	0.99
Output	Voltage	220/230Vac( 1± 2% )
	Frequency	Synchronize with utility power(utility mode); 50/60Hz ± 0.2Hz(battery mode)
	On-load factor	0.8
	Overload rating	125% overload,1min
Battery	Type	Valve-control lead acid maintenance-free battery
	Back up time	more than 11min	External	more than 11min	External	more than 11min	External
		(half load)		(half load)		(half load)
	Rated voltage	12V		12V		24V
Transfer time		≤5ms
Operating environment		Humidity: 20%-90%, Temperature:40oC
Size (WxDxH) mm		350X144X229		424X190X328		424X190X328
Net Weight(kg)		11.5	5.7	22.2	10	26.3	10

1000va pure sine wave UPS power