http://www.tuncmatik.com/ru/product/overview/digitech-eco-2000va.html Product Code TSK3672 Capacity / Power 1500 VA / 900 W Display LED Panel Input Voltage 220 / 230 / 240 VAC Voltage range 162-265 VAC Frequency 50 / 60 Hz ± 10% Output Voltage 220 VAC Voltage range ± 10% Frequency range (Synchronized) 50 / 60 Hz ± %4 Frequency range (Battery mode) 50 ± 0.25 Hz - 60 ± 0.3 Hz Transfer time 2 - 6 msec, 10 msec max. Waveform Simulated sine wave Output connection 4 x Schuko Battery Type & number of battery 12V 9Ah x 2 Charge time 6 hours for recharging up to 90% capacity Charge voltage 27.0 VDC Charge current 1.0 A Management USB communication port Windows¨ 98/2000/2003/XP/Vista/2008, Windows¨ 7/8, Linux, MAC RJ11/45 protection port Phone - Network - Modem Protection Dimensions & Weight D x W x H (mm) 392 x 177 x 211 Net weight (kg) 10.7