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Under normal circumstances: The USB interface itself does not pose a risk of electric shock. The real concern is not the USB output end, but rather: Whether the high-voltage to low-voltage conversion process inside the wall socket is safe and reliable.

Strictly speaking, a Wi-Fi Wall Switch is an electrical control device that integrates a wireless network communication module into a traditional wall switch. A Wi-Fi Wall Switch is not simply a "button with network functionality," but rather an electrical control terminal with network connectivity.

"DP" is an abbreviation for Double Pole, commonly referred to in Chinese as: Double-pole wall switch This means: • When the wall switch operates, • it disconnects both wires simultaneously • typically the live wire and the neutral wire This is the fundamental difference between a DP wall switch and a regular single-pole (SP) wall switch.

In some standard systems, 13A plugs are equipped with internal fuses (such as 3A, 5A, 13A). If: • The appliance does attempt to draw more than 13A of current under certain conditions • The fuse inside the plug may blow • Causing the appliance to malfunction

This is the most pressing question for most users and is the most common situation in Chinese household electricity environments. According to the formula: Power = 220V × 16A = 3520W

A fan speed control wall switch is a specialized switching device used to change the speed of a fan. It is installed on the wall and adjusts the fan's power supply voltage, phase, or frequency to regulate the fan speed, thereby controlling the fan's rotation speed and allowing users to obtain different levels of airflow.