1.It has passed the UL authentication in America, and passed the ISO9001:2000 quality system authentication. 2.It's quality is good and price is low. 3.The suitable cables are SPT-2,-3,NISPT-2,SVT 16/3,SPT-3 14/3,SJT,SJTO,SJTOO,SJTW,SJTOW,SJTOOW,ST,STO,STOO,STW,STOW,STOOW,16/3,14/3,12/3