Description The flash Christmas tree kit consists of a combination of three circuit boards, have clearly marked the electronics components, it's easy to assemble. It is not only a decorative gift for Christmas, but also a PCB board for practicing welding skills. Features - Color: Green.- Material: Plastic.- Size: Approx. 6 x6 x13.6cm.- Work voltage: DC4.5V- 5V.- LED quantity: 37PCS.- The flash Christmas tree kit consists of a combination of three circuit boards, the user through their own welding assembly.- Before soldering the LEDs, it is recommended to use a multimeter to check if there are any LEDs that are not bright.- Please make sure all components in right direction and right place; and check whether pseudo and float welding, this is very important in practicing and testing.- 37 LEDs alternating flashing, in the space of a Christmas tree in the outline of the three-dimensional, really a beautiful decoration and can add a lively atmosphere (night environment to see better).- The product is used for learning. Suit for people above 18 year's old with 1 year electronic diy experience. Or use it correctly under the guidance of electronic specializer.Packing list: 1 x Set of LED Christmas Tree Kit