The Bitmain Antminer 7007V Control Board (S19,S19+,S19i,S19 Pro,T19,S19j,S19j Pro,S19j Pro+,S19 XP,L7,D7,K7,KA3,HS3,D9,DR7) optimized for air-cooled, this high-quality control board ensures uninterrupted mining, efficient cooling, and comes packaged separately with support. By purchasing a new control board instead of repairing and replacing control board parts yourself, you can greatly save operation and maintenance time and costs, and replacing the control board is faster and more convenient.