Transfer files easily: Mac-compatible audio recorder. It supports recording files in MP3 or WAV format. You can connect to the computer via the included Micro USB cable to transfer files easily.AB REPEAT function: This is a great function that can help you learn the language and review the course from the selected starting point A to the ending point B. You don't have to go back to listen to the words.Portable and practical, can be carried with you, convenient for recording in meetings, conversations, telephones and other occasions where recording is required, and can record high-quality voices for several hours (based on the recording mode and the number of batteries)Voice recorder: Set the recorder to voice recorder and only collect voice. Now, there are no more silent whispers or clips in your recordings. Effectively save the space of the recorder and your listening time, the built-in LCD screen, you can check the working status, and the operation is simple.Built-in lithium-ion battery, which can be charged directly via USB PC or DC5V output adapter.