Founded in 2001, Shenzhen Longsign Electronic Co., Ltd. is a hi-tech enterprise engaged inthe development, manufacturing and selling of various high-frequency electronic products including tuners, radio-frequency modulators, and LCD TV AD boards. Our products are widely used in CRT TVs, LCD TVs, HD TVs, bus AV, DVB-T/C satellite receivers, CATV set-top-boxes, VCD/DVD players, car audio systems ,home theaters, HI-FI game videos, multimedia TV cards, etc.. Today we are proud to expand our business throughout more than 30 countries and regions in Southeast Asia , Southern & Northern America, Europe.We have two manufacturing bases: one is in Shenzhen city for tuners & modulators, and the other in Foshan city for LCD TV AD boards. Our factories own automatic production lines, advanced SMT machines, non-lead wave soldering, non-lead SMD-circumfluence soldering, frequency-scan equipments; more than 40 engineers and mechanists secure the whole manufacturing , inserting, testing processes going smooth. our annual production capacity is 15,000,000 pieces of tuners, 1,000,000 pieces of modulators and 600,000 pieces of LCD TV AD boards. Guided by the principle of "Honest, creative and competitive", our aim is to become a famous enterprise in the world.