This operation step requires a certain degree of professionalism. If you don' have the basics, it is not recommended to buy it. Please note: If you are a miner, this product does not come with the for NerdMiner program, you need to burn the for NerdMiner program yourself. If you are not a miner, this product is also a development board, you can use it as a development board normally! Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Type:4MB Colour:Black Material:PCB Package Contents: 1 * Control Board 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.