家里网速慢，很可能是路由器旁放了这4样东西！

Core Viewpoint - The article discusses common issues affecting WiFi signal strength, emphasizing that the placement of routers and nearby objects can significantly impact performance, rather than the router's quality itself [1][2]. Group 1: Router Placement Issues - Metal objects, such as metal boxes or shelves, can cause electromagnetic shielding, which weakens WiFi signals. Even a thin layer of metal can significantly reduce signal strength [20][22][23]. - Placing routers in weak electric boxes made of metal can reduce signal strength to as low as 20% of its original capacity, making the connection nearly unusable [25]. Group 2: Electrical Interference - Appliances like refrigerators and microwaves can interfere with router performance due to their metal components and power consumption patterns. When a refrigerator's compressor operates, it can cause voltage drops that affect the router's stability [27][33][35]. - Sharing an outlet with high-power appliances can lead to unstable signals and frequent disconnections, especially during peak usage times [38][40]. Group 3: Frequency Interference - Microwaves operate on a frequency of 2.4GHz, which overlaps with many routers' signals, potentially causing further interference and connection issues [43].