Smile Dental Digital Amalgamator Amalgam Mixer Capsule Lab Equipment G8 Four reviews and only one negative review,complaining about the loudness.The right step is:There are 3 red screws on the bottom of the unit which need to be removed.And then it will be very quiet. Be controlled by a microprocessor to ensure a precise, controlled, consistent mix. For safe operation, the motor will stop when the mask is open. It can satisfy your different requirements,adjust speed from 2800 rpm to 5000rpm; time from 1S to 99S. Ergonomic design with digital LCD showing speed and time.