If your mining site is located within a household space, then the Z15 420K is a good choice. Generally, the sound scores of the mining machine are concerning 60-90dB and the sounds value of Antminer Z15 is about 70dB, so it entirely fulfills it fully consistent with The desired sound https://z15-miner-order63718.myparisblog.com/40661640/not-known-facts-about-bitmain-antminer-z15-pro-840ksol-s