1. High-brightness 2.5D curved glass panel, 8 touch function icons.2. Bluetooth function: support pairing with external Bluetooth devices such as mobile phones to achieve audio playback. Bluetooth name can be modified directly3. AUX: support external audio input machine, amplification output.4. Memory card function: external TF card, support USB flash drive.5. Audio format: support MP3, WAV, WMA, FLAC, APE, DTS, AAC, AC3, OGG and other audio formats.Volume adjustment, previous song, next song.Support power-on playback: automatically play songs when powered on.Infrared remote control function: provide a variety of shortcut keys, humanized operation.Doorbell trigger: support external doorbell trigger function, GND is connected to the doorbell interface (doorbell interface).Trigger playback: GND is connected to the trigger playback interface to trigger, long press the play/pause button to turn it off.Colour:BlackMaterial:Metal+PlasticPackage Contents:1 * Embedded Host System ControllerOnly 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.