It*s diy kits. Need to solder by yourself.
Working voltage: DC4.5-5V
Finished Dimensions: 60mm length *60mm width *136mm height
The flash Christmas tree kit consists of a combination of three circuit boards, the user through their own welding assembly, so that the 36 LED alternating flashing, in the space of a Christmas tree in the outline of the three-dimensional
English instruction dl from links: http://pan.baidu.com/s/1gdCZbl5

Technical Details

Size (LWH): 5.12 inches, 3.54 inches, 0.79 inches
Product Details
Product Dimensions: 5.12 x 3.54 x 0.79 inches
Shipping Weight: 0.13 pounds (View shipping rates and policies)
ASIN : B017R7T8AQ