Gikfun Electronic Hourglass led DIY Kits Welding Practice Board Blue Ray EK1886 Description Features: This is a beautiful electronic hourglass that is fun to build and nice to look at when finished, it is not only a PCB board for practicing welding skills, but also a decorative gift for you. Comes with English user manual and online PDF file, which will guide you how to finish step by step, perfect for school basic electronics experiment projects. The suite adopts double layer PCB, and the circuit consists of 30 pieces white LED blue ray. Under the control of MCU program, it displays analog hourglass image. Power Supply Voltage:3.3-5V Product Details: Brand: Gikfun Product Dimensions: 0.7"L x 3.8"W x 5.7"Th Material: Iron Shape: Rectangular Product Care Instructions: Hand Wash Only Item Weight: 1 Pounds Manufacturer: ‎Esooho Brand: ‎Gikfun Item Weight: ‎1 pounds Package Dimensions: ‎5.71 x 3.82 x 0.67 inches Is Discontinued By Manufacturer: ‎No Shape: ‎Rectangular Material Type: ‎Iron Date First Available: November 23, 2017