This easy-to-use detector is the first to detect counterfeit bills printed on genuine treasury paper as well as alternate types of paper such as copy paper, newspaper, recycled paper and more. Unique formula detects counterfeit ink, and is an accurate and affordable device to be used with other counterfeit detection methods. The no-mess, no-leak, non-toxic formula won't dry out. Each bottle provides over 1,000 applications. 1.5oz. bottle. Patent pending.