20,000 watts maximum capacity. Converts 110/120V to 220/240V or converts 220/240V to 110/120V. Compatible with 50Hz/60Hz. on/off switch with indicator Lamp. Voltage stabilizer good for countries with unstable voltage supply. This stabilizer can regulate big range fluctuating voltage into general voltage output. Input voltage AC 75V-130V or 180V . Output voltage: AC 110v+-4% or ac220v+-260v. -4%. 5 outlets on front of unit (outlets accept 3 or 2 prong US plugs and 2 prong Euro/Asian plugs). 20,000 watts maximum capacity durable design with 2 heavy-duty carrying handles. Fuse protected with built-in thermal fuse - protects damage to your valuable equipment from voltage fluctuation. Comes with terminal connectors - hardwire input required. Note: This Voltage regulator is meant for only SINGLE PHASE power. It will not work with 2-Phase 220 Volt