The APC Back-UPS 350 (Model BK350EI) is a reliable standby (offline) uninterruptible power supply designed to protect your home or small office electronic devices from power outages, surges, and voltage fluctuations. Offering a power capacity of 350 VA / 210 Watts, this compact tower UPS ensures your critical equipment stays powered long enough for safe shutdown or uninterrupted short-term operation during power disruptions.

Key features include four IEC 60320 C13 outlets that provide a combination of battery backup and surge protection, LED status indicators and audible alarms to keep you informed of power status, overloads, and battery conditions. The user-replaceable sealed lead-acid battery (compatible with APC RBC2 replacement) supports easy maintenance.

With a 230 V / 10 A input via IEC-320 C14 inlet and automatic 50/60 Hz frequency sensing, this UPS offers surge suppression rated at approximately 300 Joules and data-line protection for telephone, fax, modem or DSL lines via RJ45 jack, safeguarding your connected devices from electrical noise and spikes.

Its standby UPS topology features a fast transfer time of around 6 milliseconds (max 10 ms), allowing seamless switching to battery power during outages. The unit recharges fully in about 6 hours. Its compact size (approx. 165 x 91 x 284 mm) and moderate weight (~6.3 kg) make it easy to situate on or under desks.

Ideal for desktop computers, networking equipment, and other sensitive electronics, the APC Back-UPS 350 is a cost-effective and effective solution to maintain productivity and protect your valuable data and hardware against power problems.