1、Blind Operation Type Recording: Ballpoint pen type mechanical rebound switch, press to start recording (pen hat lower), and then press to end recording and save (pen hat rise). 2、Multifunctional: When recording data, digital voice recorder can record while writing to achieve two way recording, and can also replace the pen refill as a signature pen. 3、Noise Reduction: Pen digital voice recorder uses an acoustic 8 core DSP noise reduction module, which has a certain reduction effect on environmental noise. 4、Connection Upgrade: Connect OTG adapter to manage and transfer files on the phone, support for Android and for iOS phone connection, plug and play, simple and convenient. 5、Applicable Headphones: Plug in the headphones can play music and recording files, support in line headphone control to switch songs, fast forward and back, volume and confirm and delete. 6、Durable Material: Metal alloy material, CNC process manufacturing and baking paint electric transition process to build, durable, anti‑oxidation, anti scratch characteristics. 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 x Pen Digital Voice Recorder 1 x Charging Cable 1 x Earphone 1 x Instruction Manual 3 x Pen Refill