[High Durability] This mini recorder is made of high-quality alloy, has a delicate feel, high resistance to fall and corrosion, and can be used for a long time. Equipped with MP3 and USB storage functions. It is an ideal recording equipment for lawyers, teachers, students, etc., and also an ideal gift. Compact mini designUsing a small and compact pocket design. The size of the mini recorder only 1.14*1.14*0.29 in and 0.35oz. Suitable to carry around daily and everywhere. Fits easily anywhere wallet, pocket or keychain. Suitable as a recording device for meetings/interviews/speaking/teaching/forensics or as U disk storage files. [Voice Activation Function & One-Key Operation] One-key operation, slide to close the save/voice activation/normal recording button, to the required gear, you can complete the recording. No additional steps are required, easy to use. Equipped with a voice activation function, when the recorder detects sound, the recording device will automatically start recording. The recording ends when the sound stops. Help you record important voice information at any time and reduce voice gaps so save space. [Automatic File management & U-disk function] This mini recording comes with a time stamp function, file encryption protection, OTG, etc. It automatically name recording files by date so that you can view and manage recordings. Support recording encryption to protect your privacy. The OTG function allows you to connect the voice recorder to your Android phone, and you can view/delete recordings directly on the phone through the adapter (the adapter is not included). [Stereo Pickup Technology & Professional Noise Reduction] The voice recorder has a built-in professional noise reduction chip and adopts the latest noise filter reduction technology, reducing environmental noise by up to 94%. Restores the human voice efficiently and accurately, to get more fidelity and clearer recording sound quality. With stereo pickup technology, the recording range can reach 200 feet.