Features 1. EASY TO USE: Ballpoint pen type mechanical rebound switch, click to start recording (cap lowered), and press to end recording and save (cap raised). 2. RECORD WHILE WRITING: Digital voice recorder pen allows recording while writing, enabling dual functionality, and can also be used as a writing pen with a replaceable refill. 3. PLUG AND PLAY: Voice recorder pen connects to OTG adapter for file management and transfer on cell phones; supports Android devices and iOS devices with plug-and-play functionality. 4. WITH EARPHONE: Includes earphone for playing music and audio recordings. Supports in-line headphone controls for song switching, fast forward, rewind, volume adjustment, confirmation, and deletion. 5. NOISE CANCELING: Voice-activated recorder features an 8-core DSP noise reduction module to help reduce ambient noise during recording. 6. COPPER ALLOY: Constructed from copper alloy with CNC manufacturing and baked paint finish for durability, anti-oxidation, and scratch resistance. Specification Item Type: Voice Recorder Pen Material: Copper Alloy Built-in Polymer Lithium Battery: 120mAh Recording Format: WAV Playback Format: MP3, WMA, WAV Package List 1 x Voice Recorder Pen 1 x Charging Cable 1 x Earphone 1 x Instruction Manual 3 x Pen Refill