Check the listing for details. Relay Module 6 Channel 5V Low Level Trigger Module Relay Module Board. Condition: New. Listed at 13.87 USD. What is this?Widely used for DSP(digital signal processing), MCU(Microcontroller Unit) control, programmable logic controller, smart home control etc.What will I get?Relay module, is in size of: 6 channel, 5V voltage, 10A AC250V/DC30V maximum load current and voltage, 0-4V trigger voltage, 3mA trigger current, 105mm x 53mm/4.13-inch x 2.09-inch(L*W)In the package of: 1pcs x Relay moduleIs there any advantages of the product?Photo coupler isolation strong driving ability, stable performance; It can be connected directly through the terminal block, which is convenient for connection; Fixing screw hole position for easy installationHow to use it?Module interface:1. VCC: connected to the positive pole of 5V power supply2. GND: connected to negative pole of 5V power supply3.