Heyi Piezoelectric pumps: Just driven by a thin piezoelectric ceramic plate,totally different from traditional electromagnetic air pumps,No EMI,NO MOTOR,NO SHAFT,NO other troublesome mechanisms,which makkes it super compact,super silent,light weight and long service life.
Where could buy super quiet oxygen compressors ?
HEYI Hpumps work silent just 33dB, Super silent. it worth you have it.
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