Only one 32A 12V battery is needed, and the design is simple and easy to use. Now on the market, using wireless doorbells and anti-theft alarm systems... the next music will be played. There are a total of five pieces of music playing in a loop.

The production of wireless music doorbells has been introduced in many electronic newspapers and magazines. Many of the music chips are equipped with multiple songs to choose from. In the production we actually guided, many beginners have not been exposed to it. As a result of electronic welding, it is very easy to damage the music integrated circuit during the production, and the multi-music music film is a special chip. Many internship instructors said that it is difficult to buy substitutes of similar models locally, which is used for student training. In order to improve students' hands-on ability and learn electronic technology, they hope to use universal music circuits. In response to these situations, here we introduce a single wireless music doorbell. The music circuit adopts the BJ-15 model, which is the most common on the market. Some manufacturers’ models are: 9300, which can be used universally.