The new is Module 4.1 winder is highly advanced and technologically sophisticated. With patented lock-in cuff and touch sensitive control panel the M4.1 boasts all the interlocking functionality of the M4.0 system with the customizable winding programs and lock-in cuff of the M2.7. Replaces and interlocks with Module 4.0 (Model #4540-027) Glass and aerospace grade aluminum Runs solely on 5.5V AC adapter (included) A plurality of Module 4.1 watch winders can be joined to create a multiple winder system. (Unit includes one connector piece.) Back-lit LCD display - New screen powers on when the control knobs and buttons are used or when the chrome plate is touched (screen will stay lit for 20 seconds) Directional settings - clockwise, counter-clockwise, and bi-directional Delayed program start - Start delay options from 6 to 72 hours with a default of 24 hours Rotation countdown - LCD screen provides a countdown of the remaining rotations to complete the daily cycle Program capacity - The individual options of rotation and direction settings combine to offer 57 personal programming options Watch cuff - The new cuff has been re-designed to fit today's bigger and heavier watches. The new design locks the cuff into the rotator drum 110/220 Volt Drum size: 71 mm deep and 77 mm wide Dimensions: 6 Inches High x 4.75 Inches Wide x 5.75 Inches Deep