EVER DUO 550 AVR USB UPS EVER DUO 550 AVR USB UPS Specifications Features UPS Topology Line-interactive Maximum Configurable Power 0.55 kVA Actual Power 330 W Waveform Sine Input Operating Voltage (minimum) 162 V Input Operating Voltage (maximum) 290 V Input Frequency 50/60 Hz Output Operating Voltage (maximum) 191 V Output Operating Voltage (minimum) 253 V Output Frequency 50/60 Hz Automatic Adjustment Voltage Protection (AVR) Yes Number of Input Phases 1 Number of Output Phases 1 Voltage Surge Protection Yes Power Protection Features Overcharge, Short Circuit Audible Alarm Yes Audible Alarm Modes Fault, Low Battery Alarm, Overload Alarm Ports and Interfaces AC Output Types C13 Panel Number of Mains Sockets 4 x Mains Sockets USB Port Yes USB Port Type USB Type B Battery Battery Type Lead Acid (VRLA) Battery Capacity 5 Ah Battery Voltage 12 V Number of Supported Batteries 1 Cold Start Yes Design Tower Product Color Black IP Rating IP20 Operating Conditions Temperature Range (Operation) 0 - 40 °C Temperature range (storage) 0 - 40 °C Relative humidity range 20 - 80% Permissible relative humidity 20 - 95% Weight and dimensions Product width 84 mm Product depth 252 mm Product height 158 ​​mm Product weight 3.8 kg Package width 122 mm Package height 225 mm