Supports reading by all computer systems Adopt high-definition DSP noise reduction microphone to restore real sound, support up to 512GB, and record super clear Parameters: Model: D3191 Interface: Type-C Recording format: WAV (352KBPS) Supported devices: mobile phones, tablets, reading files (for example: accessing the mobile phone to display language and text synchronized with the mobile phone) Mobile operation: play, delete, share, file name, store Battery: 130MAH Signal-to-noise ratio: 96db@1KHz Function: recording, U disk storage, writing Capacity time: 32GB storage 136 hours Battery time: about 10 hours of continuous use Charging time: Charging time is about 40 minutes Material: magnesium alloy colour: A-grey Package Contents: 1 x Voice Recorder Pen 1 x USB adapter 1 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.