Shenzhen Tengweida Electronic Co., Ltd.(Hongkong Tengweida Electronic Co., Ltd.) is one of the most important professional manufacturers in Shenzhen of China, Specializing in various wired CCD cameras, PTZ cameras, DVRs, CCTV tester, CCTV power supplies and UTP video baluns etc. Clients in Europe, America, South America and South East Asia are benefiting from our products.