The traditional router uses copper tube antenna, the open antenna occupies space, the appearance is complex, making the home environment chaotic. However, the integrated routers mostly use built-in PCB antennas, and the signal strength and performance are far weaker than copper tube antennas, which greatly reduces the performance of routers. Therefore, thinking about a router that can integrate copper tube antennas, not only to ensure the appearance of the product is beautiful and concise, but also to ensure the performance of the product, M4 was born from this.