Some time back I bought a FM transmitter from Hong Kong, via ebay. The instructions supplied were the bare minimum.
It uses 2 AAA batteries, and also came supplied a car cigarette lighter adapter for DC input.
When using it at home I would like to use a mains adapter but have no information about what level to use. My fear is that I could damage it if I got it wrong. Is there any way of figuring it out, based on the facts above (AAA batteries, car lighter adapter) ?
There is nothing (on the unit, on the 'documentation', on the car lighter adapter) that answers this question for me.