The Boxy Brick Watch Winder with multiple conductivity features. Stack up to 3 high and operate independently with only one A/C adopter. Stack up to 12 watch winders (with PES-4 plate or PES-WH housing) and operate independently withonly 1 A/C adopter. Features include:Three TPD (Turn per Day) settings A. 672 B. 960 C. 1248. It covers TPD requirement for most of the automatic watches sold worldwide. Many watch winders sold in the market have only one setting.Three winding modes: *Clockwise *Automatic Bidirectional *Counter clockwiseLight Sensor controls the accuracy of TPD & Rotating Position.Japanese, MABUCHI brand, Belt Driven motor system which is silent and long lasting.AC/DC Adaptor IncludedONE FULL YEAR IN HOUSE MANUFACTURER WARRANTYSize: 97 x 104 x 110mm (3.75 x 4 x 4.5 inches)*Note: If you do not know what direction or how many TPD your watch require, begin with 1st lowest TPD setting and automatic bidirectional mode.