NOYITO 4-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch bee Material: Paper doilies are made

Material: Paper doilies are made of food-grade paper

you can also prepare them as reserve tools

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NOYITO 4-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch bee Material: Paper doilies are madeNOYITO 4 Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch Hardware introduction and description Board size: 56 x 63mm Board Interface Description: COM1: common; NC1: normally closed; NO1: normally open. COM4: common; NC4: normally closed; NO4: normally open. Communication protocol description: Default communication baud rate: 9600BPS Turn on the 1 channel relay switch: A0 01 01 A2 Turn off the 1 channel relay