家里网速慢，99%是路由器旁放了这4个东西！

Core Viewpoint - The article discusses common issues affecting WiFi signal strength, particularly focusing on the impact of metal objects and electrical appliances on router performance. Group 1 - WiFi signals can be significantly weakened by metal objects, which cause electromagnetic shielding, reflecting and absorbing signals [27][30][26] - Many users mistakenly believe their router is faulty when the real issue is interference caused by placing the router near metal objects, such as iron shelves [33][10] - The article emphasizes the importance of router placement to ensure optimal signal strength, suggesting that users should avoid placing routers in metal enclosures or near other electronic devices [11][25][12] Group 2 - Electrical appliances, especially refrigerators and microwaves, can disrupt WiFi signals due to their metal components and power consumption patterns [35][41] - The article highlights that sharing power outlets with high-demand appliances can lead to unstable voltage, further affecting router performance [43][46] - It notes that microwaves operate on the same frequency as many routers, which can cause interference and signal degradation [53][54]