15,000 Watt Maximum Capacity Requires hardwiring. For safety reasons only a professional electrician should install this item for you. Voltage surges damage all electrical or electronic items like: TVs, VCRs, DVD Players, Computers, Printers, etc. Voltage drops damage all motor driven appliances like: Refrigerators, Freezers, Air-Conditioners, Pumps, etc. This model will protect your appliance from both situations while converting the voltage. Works as a Step UP Transformer and also Step Down Transformer - Just by flipping a switch! Step UP Transformer and Stabilizer function: Converts 110/120 Volt up to 220/240 Volt while keeping output voltage steady. Step Down Transformer and Stabilizer function: Converts 220/240 Volt down to 110/120 Volt while keeping output voltage steady. Heavy-Duty continuous use transformer Precise power source indicator - Analog meter on front of unit measures input voltage (shows you the exact output voltage).