Type 4 Quad USB Relay Module USB Intelligent Control Switch USB Computer Switch--shop.rfid-life.com

Relay Module
$8.27
Quantity
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Description
Product Description
1: External power supply port: connect to DC5V power supply. Due to the limited output current of USB, when using more than 2
relays It is recommended to use external power supply when the device is used; 2: USB power supply/external power supply switch:
switch to Usb_P for USB power supply, and switch to Ext_P for external power supply; 3: USB holder: USB communication/power
supply; ④: Reserve the USB pin header.