1. 1 inch OLED screen 128x64 with back clip 2. Zinc alloy material+I isolation process, electroplated integrated lenses, 3.5 earphone holes, Micro-USB 3. Support Bluetooth transmission, e-book, timed shutdown, AB reading 4. One click recording, P3 recording, PC isolated linear recording 1536Kbit, 30 hour recording time, optional voice control recording, automatic segmentation recording 5. Supports multiple playback formats: MP3, WMA, OGG, APE, FLAC, WAV, AAC-LC, ACELP Supports 28 languages, with lyrics display, continuously playing for 15 hours Model:M9 size:4.2 x 4 x 1.2cm memory:8G display:1.2-inch color screen Music format:MP3/WMA/WAV/APE/FLAC Bluetooth:Bluetooth 4.2 Playback time:38H EQ sound:Normal, Rock, Funk, Hiphope, Jazz, Classical, Electronica, Custom. Lyric format: E-books:/ FM radio:87.5-108MHz/76-90MHZ Recording format:WAV/MP3 Frequency range:20HZ-20KHz Signal-to-noise ratio: 90dB Headphone output:Stereo channel output language:Chinese words Battery capacity:Built-in polymer battery Color: Black Material: Zinc Alloy Package Contents: 1 * MP3 1 * headphone cable 1 * data cable 1 * English instruction manual 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.