This is a small recorder. I bought it on Amazon for my elementary school son's outdoor learning, but he ended up not using it, so I'm selling it. I opened the box to take photos. Please understand that this item has been handled by a person, so only those who understand this are welcome to purchase. ---The following is quoted from Amazon: Compatible Devices: Computer Brand: QZT-JP Hardware Interface: USB Microphone Waveform Rate: Built-in Format: MP3 Audio Number of Batteries: 1 Lithium Ion battery (included) Product Dimensions: 4 depth x 22 width x 44 height mm Memory Storage Capacity: 8 GB Microphone Operation Mode: Stereo [Enhanced Version] QZT Voice Recorder, Small, 8GB Large Capacity, 15 Hours Continuous Recording, 96 Hours Recording Storage, Long Time IC Recorder, Voice Detection, OTG Compatible, Small Voice Recorder, One-Button Recording, Small Recording Device, Automatic Battery-Low Saving, Noise Cancellation, Portable [60M Ultra-Long Distance Recording] High-sensitivity stereo microphone picks up 360° sound without fail. 192kbps sound quality recording is possible! You can enjoy high-quality recording. Very clear recording sound quality, the best experience recorder! Excellent design for portability! It has a high-sensitivity sensor, and the sound quality is not affected at all even if you put it in your pocket. Can record up to Max60M. Time synchronization needs to be set on a computer.