Specification: Item Type: Pen Digital Voice Recorder_x000D_Material: Copper Alloy_x000D_Built in Polymer Lithium Battery: 180mAh_x000D_Recording Time: 15H_x000D_Playback Time: 10H_x000D_Charging Time: 2.5H_x000D_Recording Format: WAV_x000D_Playback Format: MP3, WMA, WAV Features: 1Blind 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). 2Multifunctional: 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. 3Noise Reduction: Pen digital voice recorder uses an acoustic 8 core DSP noise reduction module, which has a certain reduction effect on environmental noise. 4Connection 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. 5Applicable 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. 6Durable Material: Metal alloy material, CNC process manufacturing and baking paint electric transition process to build, durable, anti?oxidation, anti scratch characteristics. PackageList: 1 xPen Digital Voice Recorder 1 x Charging Cable 1 x Earphone 1 x Instruction Manual 3 x Pen Refill