Model:Q90B Colour:Black Material:Copper alloy Size:155*13mm Weight:22.3g USB port:3.5mm headphone/charging port Battery Capacity:180Mah Recording time:15H Playback time:10H Charging time:2.5H Recording Format:WAV Playback format:MP3,WMA,WAV Memory Capacity:32GB OTG can support connecting Android/Apple mobile phones: Connect the OTG adapter to manage files on your mobile phone, plug and play, simple and convenient. A voice recorder top four multi-functions in one. Both a voice recorder, also a signature pen, MP3, U disk, you can use the USB charging/transfer/headset three in one. Support MP3 playback, lossless sound quality playback, plug in headphones will be able to play music and recording files Support in-line headphone control to switch songs, fast forward and backward, volume. USB flash drive function: EMMC embedded flash memory. Using integrated flash technology, EMMC embedded storage, compared to TF card more stable, longer life, 3.0 interface transmission storage faster.