Features 1. Blind Operation Type Recording: Ballpoint pen type mechanical rebound switch. Press to start recording (pen cap lowered), then press to end recording and save (pen cap raised). 2. Multifunctional: Voice recorder allows recording while writing for dual functionality. Compatible with standard pen refills for use as a writing instrument. 3. Noise Reduction: Built-in 8-core DSP noise reduction module helps reduce background noise during recording. 4. Connection Upgrade: Supports OTG adapter for file transfer and management on mobile devices. Compatible with Android and iOS devices. Plug-and-play design for easy use. 5. Headphone Support: Connect headphones to play back files. Supports in-line controls for track navigation, volume adjustment, and playback functions. 6. Durable Design: Constructed from metal alloy with CNC manufacturing and baked paint finish for durability, scratch resistance, and anti-oxidation properties. Specifications Item Type: Pen Digital Voice Recorder Material: Copper Alloy Built-in Polymer Lithium Battery: 180mAh Recording Time: Up to 15 hours Playback Time: Up to 10 hours Charging Time: Approximately 2.5 hours Recording Format: WAV Playback Format: MP3, WMA, WAV Package List 1 x Pen Digital Voice Recorder 1 x Charging Cable 1 x Earphone 1 x Instruction Manual 3 x Pen Refill