1,[Multi-functional Convenient] It's a pendant or charm or keychain, or a mini recorder, hang chest or hang backpack or hang key, small and mini, waterproof and dustproof, hard and shell. 2,[One-Key Recording] Record on, save off, no light, no sound, silent recording, voice-activated recording, intelligent voice-activated design with sound recording, no sound automatic pause to effectively save memory and power. 3,[Intelligent Noise Reduction] Clearly restore the human voice and then the noisy environment is not afraid, built-in dual-core noise reduction technology, according to different recording scenarios automatically reduce environmental noise, so that the human voice conveys clear details. 4,[Support cell phone OTG playback] Comes with a special headset, the second into MP3, recording can be directly plugged into the headset operation to listen to the recording, listen to music, play or pause, up and down the song, file deletion, etc. .... Can connect OTG to cell phone file import, export, etc... (Only support Android phones) 5,[Multi-scenario Applicable] Suitable for interviews and forensics or meeting records or teaching lectures or business talks, etc. ..... Recording format: WAV USB: mini USB2.0 Microphone: condenser dual microphone core microphone Memory capacity: 16G Colour:Black Material:plastic Package Contents: 1 x Recorder 1 x Charging cable 1 x Wired earphone 1 x Lanyard 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.