The ELEGOO solderless prototype board is ideal for high frequency and low noise circuits. With 400 connection points, 2 positive and negative power lines on both ends, and a white ABS plastic body with black printed legend, this board is perfect for Arduino electronic projects. It features self-adhesive tape on the back for easy placement of the official Prototype Shield. The special spring clip is designed for over 5,000 insertion cycles. We manufacture, produce, and sell ourselves, allowing us to control the quality of our products. We would like to receive your valuable suggestions to improve our products and make your idea come true. Packing list: 3 pieces of 400 connection points protoboard.