8 Channel Relay Module with light coupling 5V

Product Name : 8-Channel Relay Module;Output Channel : 8
Power Supply : 5V;Load Voltage : AC 250V 10A,DC 30V 10A
Total Size : 137mm x 56mm x 17mm/ 5.4″ x 2.2″ x 0.7″ (L*W*H);
Mounted Hole Size : 3mm/ 0.12″
Mounted Hole Center Distance : 132 x 50mm/5.2″ x 2″(L*W);
Material : Electric Part
Weight : 122g;?
Package Content : 1 x 8-Channel Relay Module