The product is a high quality 800mA regulated DC Adapter with the ability to convert the power from your car cigarette lighter. The following power output selections are available 1. 5, 3, 4. 56, 7. 5, 9 or 12 Volts, You may use this product with most portable cassette players, radios, CD players, hand held games, keyboards, calculators, and many other battery operated appliances. This unit also has reversible polarity to allow you to use it with products that have either positive or negative center pin.