The 12-volt 3-amp adapter was designed with versatility in mind. It's ideal for providing a steady and reliable supply of power to a variety of electronic equipment. A Compact Adapter with 12 volts, 3 amperes output This compact adapter features a safe 12 volts, 3 amperes output. It is designed for devices that require exact voltage and current output. Such can exist only in devices whose measure of electrical energy is bypassed. Its main functions are: battery charging, operation of small electronic devices such as walkmans and calculators; and maintaining back-up power systems that store grid electricity. Technological features of this adapter include over-voltage protection, short-circuit prevention and a thermal shutdown mechansim that ensure safety and longevity for both the adapter and its connected device. Common applications range from automotive and marine uses to powering small household electronics and personal gadgets.