Looking for Mini Size & Discreet Voice Recording Device In The World? - Here is Exactly What You Want 16GB Super Mini Voice Recorder / USB Memory Stick / MP3 Player / Keychain with Large Capacity 16GB Large Capacity: Store 194 Hours of recording files. Recording Method: One-Key normal recording / voice activated recording / saving Playback Way: Voice recorder with earphones for quick playback/ play on computer (WAV format - use Player support this format) Voice Activated Recorder: Factory defaults to close it ( VOR = 0) 1-7:turn on Sensitivity of VOR, 1 is biggest. (Set up at "FACTORY" file) File Management: view/delete/playback recording files on the All Android Phone / MAC / Windows Computer ( iPhone Not Support) OTG Function: Quick file transfer/view via phone, only support android phone w/ OTG function (cant operate software via phone) Time Stamp: Recording files are named by date and time format for easy searching (Need Set up before first use) Magnetic Absorption: use on iron metal surface, like car, metal desk, bed etc. Instruction Guide: check "video instruction" and many "digital instruction file" at recorder's drive at computer.