70W DC 4 channel 5V Relay module extension board Relay Shield V1.3 with XBee form socket and 315/433MHz RF module interface for arduino The Relay Shield is an Arduino compatible smart module with 4 mechanical relays providing an easy way to control high voltage. The max switching power is 70W DC. It can be directly Read more about 70W DC 4 channel 5V Relay module extension board Relay Shield V1.3 with XBee form socket and 315/433MHz RF module interface for arduino[…]