Specification: Brand: Unbranded Screen size: 4.0 inches Body size: 103mm*58mm*10.5mm Battery capacity: 1500mAh Battery Type: Lithium battery Recording function: Support MIC recording Lyrics display: LRC lyrics synchronized display Screen saver standby: about 500 hours Text reading: TXT format Display: OLED touch full screen Screen resolution: 480*800 Interface: USB 2.0 Headphone jack: standard 3.5mm round hole Screen color: color screen Menu language: comes with multi-language, can be switched Bluetooth: support WiFi: Support Body capacity: 18GB and 216GB Body Material: Aluminum metal body TF function: support up to 256GB Radio function: Support Playback mode: repeat play Endurance: 30-40 hours of audio, 4-6 hours of video in the screen saver state Audio formats: support numerous formats of lossless music MP3W MA, OGG, APE, FLAC, WAV, ACC-LC, ACELP and other formats to play Video formats: support RM, RMVB, AVI, MKV, VOB, MOV, FLV, ASF, DAT, MPG, MPEG, MP4 and other formats (1080p HD video without transcoding direct playback)