Our 12V 300ma 7 Watt or 500ma 10 Watt Regulated UL Listed Power Supplies (Transformers) are most commonly used for cameras (ours included). Works on 12V DC cameras that draw less than either of these MA ratings. However if your camera's specs draw within '50' of the 300ma limit, then we recommend choosing the next - the 500ma Power supply. Make your selection above! $6.95 each