HJ Tech was found in 2009 and rename to Dongguan HJ Technology Co. Ltd in 2015. They specilize in Antenna Manufacturing, R&D and sales for more then 13 years. Their products range include Precious Electronic Connectors (USB, HDMI, SIM Card, etc) , RF Coaxial Connector (SMA, SMB, IPEX, F type, N type, TNC, BNC, etc) , FPC Cable and variety of Internal & External Antenna with wide Band range, which include 2.4 G, 5.8G, 3G, 4G and so on.