Motors are low speed,low noise,long life Approved:UL,CE,VDE, ISO, CCC,RoHS Mainly ... , UL,CE, VDE, RoHS Our mainly product is stepping motor, synchronous motor, copper pipe and heat exchange for air-conditioner, mold.And ... KNoise≤30 dB(A) 35BYJ46-W3-A 12v micro dc Stepper Motor