We have upgraded the firmware to add a new EXTERNAL MIC function, if you would like to try it out, please check following link,
download the zip package which include upgrade tooling, new firmware and detailed instruction.
https://drive.google.com/file/d/1BSaoFj0TR1SkJRvE68JTP7lN7I8cWfbh/view?usp=sharing
The following is the lastest user manual after upgrading the firmware.
https://drive.google.com/file/d/1_vgov6OoH_b0BysAOnIkVVNf-n8IAjEt/view?usp=sharing
The following is the English version of video tutorial
https://drive.google.com/file/d/1tUVNXbJAjOIm-qzgITveplz2RxBM9grK/view?usp=sharing
The following is the Spanish version of video tutorial
https://drive.google.com/file/d/18kl2cNn1isz3OmgMPkniHQsDW4gsU0os/view?usp=sharing
Specifications
Display: 1.44 inch colorful screen
Device Storage: 16GB, extra memory card: 64GB/128GB
Rechargeable battery capacity: 3.7V 600mAH
Charging time: 3-4.5hours
Recording format: WAV /MP3
Features
Zinc alloy die cast casing
Built-in high sensitivity dual microphone
Dual-core denoise recording
VAR/VOR systems (Voice Activated/Operated recording)
Support Line-in recording/Timer record/Recording monitor/Recording divide
MP3 player, support ape/flac etc lossless music format
Variable speed playback/A-B repeating/T-MARK function
Automatic noise reduction/Password protection