1. ### Functional Features - [Timestamp Function]: This recorder is equipped with a built - in clock chip, which can accurately record the specific time of meetings, interviews, conversations, etc. After being synchronized with a computer, the recorded files will be named according to the time. - [Encryption Technology]: The recorder uses advanced recording encryption technology. Without the operation of the owner, the recorded content cannot be listened to, and others cannot copy the stored data. - [Noise Reduction Function]: This digital recorder has been optimized and upgraded with audio noise reduction technology. It can filter out noise, ensure the sampling rate, and output the original and clear human voice. - [Two Modes]: The first is the normal mode, which can be used by turning on the switch. The second is the voice - activated mode, where the recorder starts recording when there is sound and automatically pauses when there is no sound, which can save storage space. - [Mobile OTG Function]: This recorder has a mobile OTG function and can be connected to an Android phone, facilitating the playback and storage of recorded files. 2. ### Product Specifications - Product Type: Recorder - Material: ABS - Recording Format: WAV - Music Format: MP3/WMA/WAV - Polymer Lithium Battery: Built - in 110mAh - Product Model: Q4 - Recording Duration: 20 hours - Standby Time: 30 days - Sampling Rate: 48KHz - Recording Bit Rate: 192KBPS - Product Weight: Approximately 8.9 grams/0.02 pounds - Dimensions: Approximately 44×9.5 millimeters/1.7×0.4 inches 3. ### Packaging List - 1 recorder - 1 user manual - 1 charging cable - 1 pair of headphones