TUV certificationm Simple,quick,safe and effective filed assembly High mechanical endurance Low transition resistance Note: 7/24 service Please feel free to contact me if you have any question on products. Your inquiry will be replied within 24hours.MC4 Cable ConnectorTwo Types1---Cable standard:only 2.5/4mm2(14/12AWG)2---Cable standard:only 4/6.0mm2(10AWG)MC4 connector and accessories