Four channel Relay Shield 5V 4 Channel 4CH Relay Shield Module for Arduino

product description description: Relay shielding (ie, 5V four relay module) is currently used in small current signal control power supply electronic module, making high-power single-chip microcomputer control devices are widely used in smart home system to make the project; and can be inserted directly into the use of Arduino compatible Class motherboard, eliminating the trouble of patch cords. Module functions are as follows: - Standard Arduino Shield interface and shape - You can continue stacking other Arduino extenders - Three M3 screw holes for easy installation - High-level drive (5V or 3.3V) NO contact closed - On-board relay indicator (red) - Special Note: When connecting with Arduino UNO board, avoid the short circuit of the green terminal due to the high UNO USB interface. Package Included: - One 4-channel relay shielded 5V 4-channel relay Arduino shielded module product information Package size 3 x 0.5 x 0.2 inch Item weight 1.6 ounces