The automatic winder settings are (A) wind 33 seconds, rest 12 minutes, (B) wind 10 minutes, rest 90 minutes, (C) wind 30 minutes, rest 3 hours, and (D) wind 1 hour, rest 3 hours.  The unit allows clockwise rotation (- setting) and counter clockwise rotation (= setting).  The approximate size is 10 inches tall, 6 inches deep, and 4 1/2 inches wide (at top) and 5 1/4 inches wide (at base) since it's tapered.

I have it about 10 feet from the head of my bed, and I can't hear it when it winds.  However, I live in the City where the ambiant noise is about 40 dB.

I'm very pleased with this purchase.