If you are a lover of computer science and electronics , you like to stay up to date with technological news and you do not miss any detail, buy the Salicru SLC-4000-TWIN PRO3 4000W Interactive UPS at the best price. Type: Interactive UPS Tower Plug-in Product: Yes Plug Type: EU Nest Color: Black Product width: 225 mm Links: RS-232 USB RJ45 Frequency: 50/60 Hz 50 - 60 Hz Lc IEC noise level: 60 dB Features: Integrated fan Cold start Voltage: 220 V 110 V Output Voltage: 240V AC Input: 50/60Hz Power: 4000W Charging time approx.: 3 hours Features: ECO Form factor: Tower AC Input Voltage: 276V