The product is made of high-quality materials with guaranteed quality Lightweight product design, simple welding, and wide application scenarios It is very suitable for DIY electronic beginners to learn welding, electronic training, handcrafted gifts, etc Shipping as loose parts requires self assembly, which can improve one's hands-on ability After soldering the insect's eyes, we can test the functionality of the circuit board by placing the 20mm button battery face up into the battery box. If the light is dim, you should see the LED light coming on. If not, please cover the sensor with your fingers for testing. If the insect's eyes don't light up, please don't worry! Starting with some simple questions, check your solder joints to ensure good connection between your components and the circuit board. The solder should flow into the inside of the circuit board and not bounce around the component pins. Also, check to ensure that the direction of the transistors and LED lights is correct. It's DIY kits, needs to finish by yourself. Color: Red Material: Plastic+Metal Package Contents: 1 * light set