What is br-700?

Unfortunately, as an AI language model I don't have sufficient context to know exactly what you are referring to with "br-700". There are many things that could be meant by this term, such as:

• BR-700 is a Rolls-Royce jet engine used in some Gulfstream and Bombardier aircraft models
• BR-700 is a model of digital recorder from the company Boss
• BR-700 is a type of lithium-polymer battery pack used in some electronic devices
• BR-700 is a chemical compound designation in the field of chemistry

If you provide me with more details or context about what specifically you are referring to, I may be able to give you more information.