Feature 1 EASY TO USE: Ballpoint pen type mechanical rebound switch, click to start recording (cap lowered), and then press to end recording and save (cap raised). 2 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. 3 PLUG AND PLAY: Voice recorder pen can be connected to OTG adapter to manage and transfer files on cell phones, support for Android, for iOS cell phone connection, plug and play. 4 WITH EARPHONE: Plug in the headset can play music and recording files. Support in line headphone control to switch songs, fast forward and backward, volume and confirmation, delete. 5 NOISE CANCELING: Voice activated recorder pen uses acoustic 8 core DSP noise reduction module, which has a certain effect on reducing ambient noise. 6 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 PenMaterial: Copper AlloyBuilt In Polymer Lithium Battery: 120mAhRecording Format: WAVPlayback Format: MP3, WMA, WAV Package List1 x Voice Recorder Pen1 x Charging Cable1 x Earphone1 x Instruction Manual3 x Pen Refill