Product Description: (15.4"deep x 6.9" wide x 8.9" tall) MIL-STD-1399 compliant Dual Conversion short tower. Mounting Foundation available for Hull mount. Double conversion type UPS wired for Delta powerDual pole circuit breakers -No fusesDimensions 390x 175x 225mm2 year warranty on all partsThe board / component manufacturer is certified to ISO9001.Frequency can be set to 50 or 60Hz or track the input frequencySmart UPS tests itself and batteries periodically Auto restart after a full run upon utility restoration Cold Start capable, premium batteries availableField replaceable batteries through front panel while onlineNOW! Output Power Capacity 900Watts @ .9pf / 1000 VA Nominal Output Voltage 120V (configurable 100-127VAC) Output Voltage Distortion Less than 3% at full load Crest Factor up to 5: 1 Waveform Type Sine waveVariable speed fan adjusts to internal temperature and limits noise 3% total harmonic distortion (THD) typical into a 100% linear load, 5% THD typical into a 100% non-linear load with crest factor ratio of 3:1. >88% efficiency USB serial interface will connect directly to a PC for automated shutdown routine. Also can be controlled and inspected with supplied Liebert™ software.Optional: Slot Interface for SNMP Network Web card PS9059- Ethernet 10/100 SNMP v1, v2c with Http interface as well as Microlink© software supplied LED status display with 5 LEDs showing % of load, and 5 LEDs showing % of battery charge Additional LEDS indicate Inverter ON, Fault, On battery, Bypass mode enabled, AC inputAudible Alarm -Alarm when on battery: distinctive low battery alarm (Alarm can be silenced via push button)Dry contacts (12v 50ma): Emergency Power Off (EPO)- Output can be disabled via shorting two pins. Battery mode Shutdown.Indicator- Battery mode (contacts switch when on Battery) 30ma max.Indicator- Low Battery (contacts switch when cells are weak) 30ma max.Standard batteries rated 5 year 0° to 40°C. Premium cells rated for 10 year -15° to +50°C.