What is a good isolation cow for Gong Gong

Ring cow. According to the query Foshan City Donghui Electronics Co., Ltd. official website shows that the ring bull transformer is a toroidal iron core, the magnetic circuit without air gap, leakage of small, stacked coefficient of up to 95 percent, no high-frequency magnetic radiation, internal resistance is small, anti-interference ability, is the first choice of the domestic power amplifier, so the power of power with a good ring bull. Isolation transformer commonly known as isolation cow.