[NEW chip]two ways to control:1. Serial port instruction control, the same as the old chip(YX5300);2. Program control, need to use with for example.It's an add on board that needs an for or some other microcontroller to play thruSupport file format:MP3/WAV,and Support Micro-SD card, Micro-SD CardSupport sampling frequency (kHz):8 / 11.025 / 12 / 16 / 22.05 / 24 / 32 / 44.1 / 48UART TTL serial control playback mode, baud rate is 9600bps. 30 class adjustable volume.Colour: blueMaterial: plastic + metalPackage Contents:3 x YX5300 ModuleOnly the above package content, other products are not included.Note: Light 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.