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 - - Material: Plastic. - Size: Approx. 6 x6 .6cm. - Work voltage: DC4.5V- 5V. - LED quantity: 37PCS. - 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 ). - 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. Package list: 1 x Set of LED Christmas Tree Kit