Product Name : General Purpose Relay;Model : JQC-3FF-S-Z(T73-5V-BL-10)Material : Plastic; Color : Black Material;Application: Modules, Development board, DIY PCB Universal Board, Connector, Cables & Adapters, IC Sockets.Function：The relay plays the role as a protector or a circuit switch,can adjust automatically, protect and transform the electric circuit, It can protect your electric equipment very well.Service： If there are any issues with your order, please contact us.