The Low-Level Trigger 4-channel 5V Solid State Relay Module Board (SSR) boasts an array of capabilities for versatile control in various applications. Each channel of this module is equipped with LED indicators, providing real-time status monitoring for precise control. It operates efficiently within a wide input control signal voltage range, spanning from 0V to 0.5V (indicating a low stage where SSR is OFF), 0.5V to 2.5V (an unknown state), to 2.5V to 20V (indicating a high state where SSR is ON). Furthermore, this SSR board handles load voltage spanning from 75 to 264VAC (50/60Hz) and supports a load current range from 0.1 to 2 AMP, making it adaptable for diverse applications. Its compatibility with a variety of microcontrollers, including Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, and TTL logic, through a standard interface, adds to its versatility. Ideal for tasks like lighting control and holiday display setups, this module comes in rated voltage options of 5V, 12V, or 24V. With phototriac isolation and zero-cross functionality, it ensures safe and efficient operation, making it a valuable addition to your control systems. The package includes one Solid State Relay Module Board, compactly designed with dimensions of 5.70 x 5.50 x 2.50 cm.