Features 1.[Timestamp]: The voice recorder has a built in clock chip to find the exact time of meeting records, interviews, dialogues, etc, and after synchronizing with the computer, the recording files will be named by time. 2.[Encryption Technology]: The voice recorder adopts advanced recording encryption technology, such as non personal operation is unable to listen to the contents of the recording, others can not copy the memory data. 3.[Noise Reduction]: The digital voice recorder has been optimized and upgraded with audio noise reduction technology, which can filter the noise, ensure the sample rate, and output the original clear human voice. 4.[2 Modes]: The first ordinary mode open the switch can be used. The second voice activated mode means the recorder will record when there is sound, no sound automatically pause, which can save storage space. 5.[Mobile OTG]: The voice recorder has the mobile On The Go function, which can be connected for Android mobile phone, and you can easily realize the playback and storage of recording files. Specification Item Type: Voice Recorder Material: ABS Recording Format: WAV Music Format: MP3/WMA/WAV Polymer Lithium Battery: 110mAh (Built in) Product Model: Q4 Recording Duration: 20 Hours Standby Time: 30 Days Sample Rate: 48KHz Recording Bit Rate: 192KBPS Product Weight: Approx. 8.9g/0.02lb Size: Approx. 44 x 9.5mm/1.7 x 0.4in Package List 1 x Recorder 1 x User Manual 1 x Charging Cable 1 x Earphone