Ornamental Gear: Self-driven; Powered by quartz movement, this part will rotate by itself.Hour Gear: Self-driven; Powered by ornamental gear, this part will rorate by itself. 15 mins/Scale.Month Gear: Manual; This part will not rotate by itself. You need to move it by hand.Date Gear: Self-driven; Powered by ornamental gear, this part will rorate by itself.Indicator: Fixed; This part will not move.How to Assemblea. Assemble the quarter gear parts according to the picture.b. Put 2 pieces of D-size Carbon Zinc batteries into battery compartment after figure out the positive (+) / negative (-) pole.c. Time Setting 1. The month gear part works by hand. Place it on month positioning gear.2. Place the big hour gear part on hour positioning gear and turn the hour setting knob on backside to make it pointing exact 12, then place date gear part on date positioning gear as well.3. Set time and date by turning setting knobs on backside.Attention:1> Please do not move the clock hands reversely or anticlockwise;2> Battery is not included;3> Please note some gears are for functional purpose, some for decor.