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Smart WiFi Relay Module Remote Control for Appliances USB Interface 53x29x16mm

USB 4-Channel Relay Board with Onboard Square USB Port for Stable PC Connection

Clear and Easy to understand Interface Relay Module for User friendly Operation

DC12V to 5V USB Step Down Converter for Raspberry Pi 4 and Smartphones

Wide Voltage Input Relay Delay Board Clear Interface Multifunctional Timer

Smart Relay Module WiFi USB Interface DC 7V to 48V For Home Appliance Use