1,[Multifunctional Convenient] It's a pendant/ charm/ keychain, or a mini recorder, hang chest/ hang backpack/ hang key, small and mini, waterproof and dustproof, hard and durable shell.2,[OneKey Recording] Record on, save off, no light, no sound, silent recording, voiceactivated recording, intelligent voiceactivated 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, builtin dualcore 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 / pause, up and down the song, file deletion, etc. .... Can connect OTG to cell phone file import, export, etc... (Only support Android phones)5,[Multiscenario Applicable] Suitable for interviews and forensics/meeting records/teaching lectures/business talks, etc. .....Recording format: WAVUSB: mini USB2.0Microphone: condenser dual microphone core microphoneMemory capacity: 16GColour:BlackMaterial:plasticPackage Contents:1 x Recorder1 x Charging cable1 x Wired earphone1 x Lanyard1 x English ManualOnly 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 +/ 13cm.