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: Allows recording while writing for dual-task functionality. Compatible with standard pen refills for use as a writing instrument. 3. Noise Reduction: Equipped with an 8-core DSP noise reduction module to help reduce ambient background noise during recording. 4. Connection Upgrade: Supports OTG adapter for file management and transfer on mobile devices. Compatible with Android and iOS devices. Plug-and-play design for easy use. 5. Headphone Compatibility: Supports standard headphones for playback of o and recorded files. Includes in-line controls for play/pause, track navigation, volume adjustment, and file deletion. 6. Durable Construction: Made from metal alloy with CNC manufacturing process and baked paint finish for enhanced durability, anti-oxidation, and scratch resistance. Specification Item Type: Pen Digital Voice Recorder Material: Copper Alloy Built-in Polymer Lithium Battery: 180mAh Recording Time: 15 hours Playback Time: 10 hours Charging Time: 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