[Ultra-thin mini tape recorder] ultra-thin size: 39*30.5*6mm, lightweight only 10g, small tape recorder is easy to carry, put in wallet, pocket, briefcase, can quickly make daily recording. This small listening device is perfect for lectures, interviews, classes, conferences, etc. This recording device can also be used as an MP3 player. [One-click recording and voice activation] Quickly start recording and save the recording with one click. It also has a voice active recording mode. It will record when it detects sound (more than 50dbs) and stop recording when no sound is detected to ensure full use of memory. [timestamp and phone connection] sync time, update to hours/minutes/seconds to record files, generation time and end time to browse and find files. Listen to recordings on your device through headphones, or quickly view or delete recording files through your Android phone with OTG function. (including OTG adapters)? [High quality recording] Our recorder is equipped with an integrated intelligent noise reduction chip, coupled with powerful DSP noise reduction, sound attenuation and filtering technology for different environments, it will never produce annoying background noise in your recording. Powerful and easy to use. Recordings can be password added to keep your data safe. When the battery is low, the recorder saves the recording file and then shuts down to ensure that the recording data is not lost. This audio recorder is suitable for beginners, easy to understand and operate