One-key recorder=easy to usemini recorder, intelligent one-key control settings, let you easily start voice recording and normal recording, no additional settings are required, push the switch to [V] to start voice control recording and make full use of the memory capacity, Push the switch to [Top] to start recording normally and detect clearer sounds.[100 hours battery life] This recording device is equipped with a 500mAh rechargeable battery, which can support about 100 hours of continuous recording time after being fully charged (the charging time is 3 hours).[Strong magnet and mini size] The professional voice recorder has strong magnetism and can be attached to any iron surface, allowing you to record easily and secretly. Small: (2.3 x 1.4 x 0.6) inches, suitable for any pocket or bag. This recorder is very suitable for recording interviews, conferences, lectures, etc. for reporters, levels, and students. With OTG function, you can play/transfer/delete recording files through your mobile phone-only Android phones with OTG are supported.Professional sound quality and password protectionThis small recorder with playback function can record up to 384Kbps of sound quality. Using the latest PCM intelligent noise reduction technology and professional chips, high-definition recording quality, real stereo experience, allowing you to enjoy clear recording and playback. And the password protection setting will protect your recording files (set on the computer).[VOR mode note] Do not push the switch to VOR and then to the ON position, or vice versa. This may cause system disorder of the equipment. [Right operation] Push the switch to VOR to start VOR recording, then press OFF to save the recording. Push the switch to On to start normal recording, and then push it to OFF to save.