A price finder is an electronic device that can help people quickly check the price of goods. It usually has a simple and easy to use operation interface and efficient and accurate query function, which can help consumers to understand the price information more conveniently and quickly when shopping, so as to make more intelligent shopping decisions. The price checking machine can be used in a wide range of retail places such as supermarkets, shopping malls, convenience stores, and can also be used for price comparison and commodity inquiry on online shopping platforms to provide consumers with a more convenient shopping experience.