... 540TVL /600TVL/650TVL3,style:outering zooming camera,IR waterproof camera,vandalproof camera,IP camera,650TVL camera,hidden camera,mini camera,etc.4,Scanning system:PAL/NTSC5, ... month and labour cost advantage, we provide good products with most competitive price. 7,More than 70 people responsible ... CE, RoHS,FCC,ISO. All the products with 2 years quality warranty!8,With powful R&D ( including 5 PhD) ...