Multi-function recording pen Weight: 35g Dimensions: 146mm length × 13.6mm diameter Charging input: 5V/0.5A Charging time: 2 hours Battery capacity: 3.7V, approximately 100mAh Recording distance: up to 10 meters Microphone: omnidirectional condenser microphone Storage: supports microSD cards from 8GB to 128GB Built-in rechargeable battery supports up to 20 hours of continuous recording and 25 hours of headphone playback Ideal for lectures, meetings, and conversations Easy operation: Press the top button to start recording and saving instantly. One-touch control ensures no important moment is missed. Records while writing and functions as an MP3 player. Each recording is automatically time-stamped for quick file identification. Compatible with multiple platforms; recordings can be played directly on the device using headphones. Professional audio device: Connect via USB cable to upload, download, view, play, delete files, and adjust settings on any platform. Portable digital recorder constructed from durable, lightweight high-grade alloy with a glossy black finish. Intelligent digital noise reduction: Optimized for clear voice capture at distances up to 10 meters. Prioritizes human voice in environments such as classrooms or training sessions, enhancing speech clarity and detail. Timestamp function: Files are named with the date for easy organization and retrieval. To ensure accurate timekeeping, calibrate the device using a computer before first use: 1. Connect the recorder to a computer using a USB data cable. 2. Open “This PC” or “My Computer,” locate and open the removable drive. 3. Navigate to the “Settime” folder. 4. Run USB_UPDATE.exe, confirm the displayed time matches your computer’s time, then click “Update.”