[Flashing LED Light Kit]: This is an LED DIY kit with a simple circuit, designed for circuit and soldering beginners. Can make private custom "" to his basic welding techniques. [DIY Electronic] 4-piece set has a competitive , giving you more to complete the welding. The FR4-A PCB board with a thickness of 1.66 mm has a transparent , making it easier for beginners to solder and DIY. Working voltage: 3-14V. [Great School Science Project]: The electronic DIY kit is used to install simple LED lights. It is used to help students learn basic electronic welding techniques. This is a great science exhibition project. It is highly recommended that you and your child practice welding techniques. [Intellectual Development] You can your own electronic . It helps to expand your thoughts and , and can also children and students. In this regard, it is very valuable. [Assembly Kit]: This is a welding technique learning kit. Basic welding techniques are required. Students should refer to the circuit and component list images in the product listing to make this kit. The FR4-A PCB board with a thickness of 1.66 mm has a transparent , making it easier for beginners to solder and DIY. The of the 4-piece set is very competitive, giving you more to complete the welding. Color: light green Material: PCB Size: 2.3 cm x 2.3 cm Package contents: 4 * 5 mm LED flash DIY kit Only the above package content, others are not included. Note: Light and different displays may cause the color of the item in a to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm.<br>