If you have any questions or consultations, please leave a comment (^-^) New, unused / Immediate purchase OK / No returns Brand: MuseDin Number of batteries: 1 (Type D batteries included) Battery life: 2 months Digital recording time: 25 hours Microphone operation mode: Noise canceling Manufacturer: MuseDin [Simple product with one-touch recording, compact design] Even when the power is off, you can start recording immediately by pressing the slide switch on the side of the main unit. It also has a "one-push recording" function, and the operability is good. The standard design and operability are also good. "REC", "KEEP", and "DEL" are displayed on the main unit, making it easy to understand how to operate, and it is easy to use for beginners, people who are not good with machines, and older people. It is a stick type with a thickness of 1.1mm and weighs only 52g, making it easy to carry. [25 hours of continuous recording possible, approximately 4552 hours of recording storage possible, split recording] It uses a large-capacity lithium-ion battery, and when fully charged for 1.5 hours, it can record continuously for about 25 hours, so it is recommended for those who use it for a long time at once, such as meetings and lectures. The split recording function is a function that can split files at intervals of OFF/30/60/90/120 minutes. After setting, the recording data is automatically split according to the set time, and each recording file is saved independently, so you can save the trouble of quickly searching for long recordings and find them quickly. [1536Kbps high-quality recording, OTG function support, easy data management] You can select from 9 levels of recording sound quality from 32kbps to 1536kbps. You can select the appropriate sound quality according to your usage scene and record in high sound quality at any time. With the latest noise canceling technology, it effectively reduces ambient noise and allows you to easily record realistic sound in various places. It also has a high-performance microphone that can capture the direction and distance of the speaker and record it realistically. It is useful in various scenes such as conversations with multiple people at meetings. With OTG function, it is easy to manage recording data on your smartphone! With OTG support, you can transfer and save data to your computer, and you can also perform operations such as playback, deletion, fast forward, and rewind on your smartphone. (Note: OTG adapter for iPhone sold separately, Type-C OTG adapter gift)