Antminer L7 silencer is a 200W power silencer specially designed to reduce noise for L7 miner. It is equipped with an automatic silencer, adopts a pure copper core motor, has large air volume, sufficient air pressure, good heat dissipation, and is economical and durable. This muffler is equipped with a speed control switch with three speed adjustments: high, medium, and low. It is convenient and fast without wiring yourself.