This transformer is a 120-volt to 12-volt device whose primary aim is to step down potentially unsafe voltages into something more useable and less protective. It takes 120v AC into 12v AC--a stable power source for all sorts of small low-voltage devices. It is designed to here: Save space with its compact size Long-life performance is assured by excellent materials and construction, thus reducing service costs Avoiding short circuits or overloads with built-in safety devices that stop immediately if there is any trouble. In a wide range of settings, homeowners use it to drive small appliances which are really productive small businesses, when low-voltage lighting systems have already replaced traditional Edisonian power. People guard their property by fair means or foul. Industrial equally apply this transformer for many tasks. I-employed enchanters are even hacking out low-voltage burglar alarm systems, the installation of which has been up till now quite expensive. These systems with a stepped down transformer used to cost most people a thousand yuan just for the equipment; contrary to this heavy investment, they may be little more than a hundred nowadays.