3-Set of Red/Green/White color which to make colorful project. Operating voltage: DC 4-6V; Size: 1.99"*1.99". Easy to install with the schematic info and the English instruction provided via email. And customers can also download the User Manual on "Technical Specification" section. Manufacturered by WHDTS. In addition to born for a perfect practice learning soldering kit it could also used as neat decoration toy and a creative and cool gifts to your beloved girl or kids. WHDTS has long been engaged in Electronics Related Products wholesale and retail business. Welcome letter to discuss the wholesale business. The bigger the amount is the more favorable the price is. Heart Shape Funny LED Flashing Light diy kit helps students to learn about the soldering project knowledge of mechanical structure electronic basis skills soldering skill and so on with full of fun.