【3-Day Ultra-Long Recording】Experience extended recording capabilities with this professional-grade voice recorder, perfect for students, lawyers, and other professionals. 【Dual Microphone Matrix】Equipped with a dual microphone system for enhanced audio capture and noise reduction, ensuring clear and precise recordings. 【One-Touch & Voice-Activated Recording】Easily start recording with a single button press or utilize the voice activation feature for hands-free operation. 【High-Fidelity Audio】Capture every detail with 1536KBPS lossless audio quality, providing crystal-clear playback of your recordings. 【Simultaneous Recording & Charging】Continue recording even while charging, ensuring uninterrupted operation for extended periods. Specifications: Recording Format: WAV/MP3 Audio Compression: 512kbps Playback Formats: WAV/MP3/WMA Battery Capacity: 18.5Wh Microphone: Built-in omnidirectional microphone Connectivity: Type-C USB 2.0 OTG Support: Yes Continuous Recording Time: Approx. 450 hours (fully charged) Frequency Response: 20-20kHz Storage Medium: Built-in storage Power Adapter: Input DC5V/1A Signal-to-Noise Ratio: 90dB ±3dB