Features:Brand new and high quality. Color:as the picture. Size:10*4.5cm-3.9*1.8inch. The module have MICRO USB and serial port , so they can communicate with PC and other device c onveniently .
Interface(Read following for details ):Modules all have Micro USB and serial port .
Micro USB:Standard micro USB mother mouth . TX : Transmit. RX : Receive. 5V : Volt c urrent c ondenser. GND : Ground. Power Interface : Only ICSE014A have . Interface is used when Micro USB cannot give enough power.
Package Included:1 x Micro USB 5V 4-Channel Relay Module USB Control Relay Module for Arduino .
NO Retail Box. Packed Safely in Bubble Bag. P059468