Feature 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.Item Type: Voice RecorderMaterial: ABSRecording Format: WAVMusic Format: MP3/WMA/WAVPolymer Lithium Battery: 110mAh (Built in)Product Model: Q4Recording Duration: 20 HoursStandby Time: 30 DaysSample Rate: 48KHzRecording Bit Rate: 192KBPSProduct Weight: Approx. 8.9g/0.02lbSize: Approx. 44 x 9.5mm/1.7 x 0.4in Package List1 x Recorder1 x User Manual1 x Charging Cable1 x Earphone