Shenzhen Handar Optical Technology Co.,Ltd is a hi-tech enterprise for fiber optical communication and CCTV (security monitoring) and has established for many years, so owns a lot of experience for fiber optical area, meanwhile, owns a professional and excellent team to serve our all customers. HD has been focused on research and production in factory fiber optical communication and CCTV devices which include media converter, video converter(CCTV), SFP module EPON and Patch cord. Our media converter distance has 2km-120km, and with double fiber optical port or Bi-Di or single port or 4 fiber optical port and has SNMP ManagedAbout our video converter has been specialize in security monitoring(CCTV), the distance is 2km to up 120km with high definition at all, so will bring you convenient and wonderful solutions for CCTV. EPON is a trend in near future for fiber optical area, and we have researched many years to get reliable, stable safe solution. All HD products has passed ISO9001, RoHs and ISO 14001 standards. If you are a trading company or do OEM or do project, so HD is your first and best supplier from China. We have best quality and best service and reasonable price. HD has offered our each customer for 2-3years warranty.