1.One-piece Metal shell, sturdy and . 2.Time stamp, automatically name the recording file by date. 3.Replaceable refill, not only for recording, but also for writing. 4.Used as a voice recorder, MP3 and USB drive. 5.MP3 player, 3.5MM headphones included. High quality WAV recording format. Support volume control, play/pause, delete files. Automatic battery detection before power off, low battery and save recording files. Voice activation, record with voice, stop without voice. One key to record, one key to save audio. Intelligent noise reduction, dual microphone. Suitable for meeting, training, study, business, lawyers and so on. Recording format: WAV Playback format: WMA/MP3 Working time: about 10 hours Battery capacity: 150mAh lithium battery Memory capacity: maximum support 128GB micro-sd card Microphone: built-in dual microphone Recording quality: 192kbps, 384kbps Playback: 3.5MM headphones Operating temperature: 0 to 45 degrees Celsius Headphone jack: 3.5MM Noise to signal ratio: 80db Compatible system: 2000 and above Colour:Black Material:Metal Package Contents: 1 x Voice Recorder 1 x Data cable 1 x 64G memory card 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.