It is a 4 Channel Isolated 5V 10A Relay Module, A wide range of
microcontrollers such as Arduino, AVR, PIC, ARM and so on can control
it. It is also able to control various appliances and other types of
equipment with a large current.Relay output maximum
contact is AC250V 10A and DC30V ..
Relay board module is used for controlling higher current loads from your microcontroller development board, PC parallel port or Arduino Uno. This board has four (4) on-board relay which can switch up to 7Amps. Relays terminals (C, NC, NO) are accessible through screw terminals which makes wiring up..