This recorder is easy to fit in your pocket or wallet and is powered by a rechargeable battery. It can be used to record meetings, conferences, lectures, and interviews. Equipped with dual sensitive microphones, this device records audio messages at 128Kbps. It is a useful tool for teachers, students, salespeople, audiences, professors, and anyone who needs to record audio. With easy-to-use operation buttons, simply switch on the voice recorder and press "REC" to record important lectures or moments. Press "STOP" to safely save your recordings, and "PLAY" to listen to what you've recorded. Press A-B to select and repeat important sections, helping you study and review your teacher's main speech in class or during a lecture. The built-in rechargeable lithium battery provides 20 hours of continuous recording. The 8GB memory can store 7680 minutes of recordings, which can be saved in various data file types, making this device a durable, portable, and reliable sound recorder. Color: Black Material: Metal Package Contents: 1 x Voice recorder pen Only the above package content is included; other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement error allowed is +/- 1-3cm.