4 relays shield, 5V, 53 x 68.5 mm, 2x TWI, 2x OUT, 2x IN, DIO, 0.044kg
The Arduino 4 Relays Shield allows your Arduino driving high power loads that cannot be controlled directly by Arduino's digital pins. The Shield features four relays, each relay with 2 pole changeover contacts (NO and NC). Four LEDs indicate the on/off state of each relay.