12V 4-Channel Relay Module DC 5V with Optocoupler

Features:

• 5V 4 channels relay module
• Configureable Activation Logic, High or Low, via mini jumper
• Maximum Current Rating: 10A
• Maximum Voltage Rating: AC 250V
• Can control various appliances with large current and high voltage
• Can be controlled directly by microcontroller such as Arduino, 8051, AVR, PIC, DSP and ARM
• Build in 4 units of Opto-Isolator for extra isolation and protection to controller.
• A power indicator LED, Green
• Each relay comes with an indicator LED