EASY TO USE: Ballpoint pen type mechanical rebound switch, click to start recording (lid lowered), and then press to end recording and save (lid raised). RECORD WHILE WRITING: Digital voice recorder pen can record while writing, enabling two-way recording, and can also be used as a signature pen with a replacement refill. PLUG AND PLAY: Voice recorder pen can be connected to OTG adapter to manage and transfer files on mobile phones, support Android, for iOS mobile phone connection, plug and play. WITH EARPHONE: Connect the headset can play music and recording files. Support in-line earphone control to switch songs, fast forward and rewind, volume and confirmation, delete. NOISE CANCELLATION: Voice-activated recorder pen uses acoustic 8-core DSP noise reduction module, which has a certain effect on reducing ambient noise. COPPER ALLOY: Voice-activated recorder is made of copper alloy, CNC process manufacturing and baking paint electro-transition process to create, anti-oxidation, anti-scratch. Item Type: Voice Recorder Pen Material: Copper Alloy Built-in Polymer Lithium Battery: 120mAh Recording Format: WAV Playback Format: MP3, WMA, WAV 1 x Voice Recorder Pen 1 x Charging Cable 1 x Headphones 1 x User Manual 3 x Pen Refills