Good clock replacement: good quartz movement work well. Simple design, easy to use. Energy efficient. Accurate timing. Great for repairing, replacing or making a clock. Wide application: You are enable to use it to repair, replace or make a home clock; Applicable to -, three-dimensional embroidery, craft home clock, frame-less draw clock, clockwork, etc. Perfect DIY clock kit, , and specially suitable for DIY quartz wall clock replacement movement parts, etc. Type: Clock Movements Size: the total shaft length is . 20 mm/ 0.8 inches, and the thread length is . 14.6 mm/ 0.57 inches; Jump second movement is suitable for 9 - 13 mm/ 0.35 - 0.51 inches thickness of clock panel Rated voltage: 1.5V Battery life (specification): . 12 Months (UM-3) Use Battery: .5V AA Carbon battery (not included) Instruction: 1. Attach the clockwork to the product to be installed. 2, is installed in accordance with the standard 12 points,when you install it, please keep the hour hand and minute hand parallel 3. Pull out the positioning pin from behind the clockwork and insert the battery. (Do not insert the battery and then pull out the locking pin.) Material:Plastic + Aluminum colour:Black + Golden Package contents: 4 x Quartz clock movements 28 x clock hands 4 set x Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.