Item Type: Pen Digital Voice Recorder Material: Copper Alloy Built-in Polymer Lithium Battery: 180mAh Recording Time: 15H Playback Time: 10H Charging Time: 2.5H Recording Format: WAV Playback Format: MP3, WMA, WAV 1. Blind Operation Recording: Features a ballpoint pen-style mechanical spring switch; press to start recording (pen head down), press again to end and save (pen head up). 2. Multifunctional: Record while writing for two-way recording, and can also be used as a signature pen. 3. Noise Reduction: Equipped with an 8-core DSP noise reduction module for effective reduction of ambient noise. 4. Connection Upgrade: Connect via OTG adapter to manage and transfer files on your phone; supports Android and iOS phone connection, plug and play. 5. Applicable Headphones: Connect headphones for music playback and recording files; supports in-line headphone control for track switching, fast forward/backward, volume, and delete functions. 6. Durable Material: Crafted from metal alloy with CNC process manufacturing and baking paint electroplating for durability, anti-oxidation, and scratch resistance. Package Includes: 1 x Pen Digital Voice Recorder 1 x Charging Cable 1 x Headphones 1 x User Manual 3 x Pen Refills