Bluetooth transmission enables wireless data transfer and streaming, while supporting ebook mode, timed shutdown, and AB reading for efficient study and listening sessions. Recording capabilities include oneclick recording and P3 recording, plus PC isolated linear recording at 1536Kbit, providing up to 30 hours of recording time. Optional voice control recording and automatic segmentation recording help manage and organize long sessions. Build and inputs feature a zinc alloy construction with an isolation process, electroplated integrated lenses, 3.5 earphone holes, and a MicroUSB port, delivering durability and versatile connectivity. Display and controls use a 1 inch OLED screen (128x64) with a back clip for easy viewing and secure placement during use. Use scenario 1: Conduct field interviews or onsite notes where a compact, longduration recorder is clipped to your clothing, using oneclick recording for ease and AB reading to compare notes or source material. Use scenario 2: In study or meeting environments, wirelessly transfer material via Bluetooth while using ebook mode for reference, and rely on timed shutdown to preserve battery after sessions. Use scenario 3: In a studio or office, utilize PC isolated linear recording at 1536Kbit for clean digital capture, with optional voice control to start or stop recording hands, and automatic segmentation to organize recordings.