900 turns per day. Intermittent rotation with pause and sleep phases pre-programmed. Also comes with optional 12 hour delay setting. Double the amount of turns per day by selecting bi-directional. Directional Settings: clockwise, counter clockwise, and bi-directional. Watch cuffs have been designed to fit larger and heavier watches up to 52mm case diameter. Glass cover. Runs on AC power (universal adapter included).