pen recorder

例句：

1. 1. This pen recorder is very convenient for taking notes in class.
   这支笔记录器在课堂上做笔记非常方便。
2. 2. The teacher used the pen recorder to play back the recordings made by the students.
   老师使用笔记录器播放了学生们录制的录音。
3. 3. The student took a photo with the pen recorder and shared it on social media.
   学生用笔记录器拍了一张照片，并在社交媒体上分享了。