5V 4CH 4 Channel Relay Shield Extended Relay Module Geekcreit for Arduino - products that work with official Arduino boa

Description Standard and shapeShield interfacescontinue to stack otherexpansion boards3 M3 screw positioning holes for easy installationHigh units 5V or 3 3V closing of the normally open contactOnboard indicator red Blue colormaterials CCLdimensions 7 6 x 1 3 x 0 5 cmRelay Shield ie 5V Quad less module is a small current power signal control equipment commonly used electronic module which allows single chip high power control devices are widely used in the SCM system to make project smart home and the use of various types of motherboards can be inserted directly into the eliminating patch cable problems Special Note When using theUNO board connected to it perches the UNO USB interface is extremely high should avoid green terminals are shorting its shell Package Included 1 x Four channel Relay Shield