Bitdeer (NASDAQ: BTDR) has officially launched its new generation of self-developed mining machines, the SEALMINER A4 series. The series includes three models: the A4 Pro air-cooled version, the A4 Pro water-cooled version, and the flagship A4 Ultra water-cooled version. The A4 Ultra water-cooled model boasts an energy efficiency ratio as low as 9.45 J/TH, while both the A4 Pro air-cooled and water-cooled versions achieve an efficiency of 10.9 J/TH.