In order for you a sophisticated Edition, go with the Z15 Pro antminer or If you would like a more cheaper miner go for the refurbished Z15 It uses a type of zero-knowledge evidence called zk-SNARKs to allow buyers to confirm that they're building a sound transaction with no revealing https://antminer-z15-second-hand97530.newsbloger.com/39991180/antminer-z15e-used-miner-overview