The iBeLink BM-K1 controller is used to replace the iBeLink™ BM-K1 Blake2S Miner faulty control board. This model has two types of control boards, which correspond to different control boards according to the fan model used. If you are unsure about your control board Board model, please provide your cooling fan model, and we will choose a suitable one for you. During the operation of the miner, the control board mainly plays the role of receiving and sending hash board data. If it is damaged, it will affect the normal operation of the miner. Therefore, it is recommended to replace it immediately. Our control board is of guaranteed quality; welcome to buy.