Dongguan Callsun electronic technology CO,.LTD situated in a  famous  manufactual city--Dongguan of Guangdong Province,which at the demand of infrared speech transmission system series  products research and development, the production, the sale is a body high technology and new technology enterprise. Under the company is equipped with the research and development department, the marketing department, the technical department, the production department, post-sale service department and so on,it has 20 professional engineers in each kind high-level, intermediate line.
We built a fully automatic production line from LED chip encapsulation to LED screen manufacturing with advanced equipments such as Automated Pick & place machine, High Speed SMT, wave soldering machine, reflow soldering machine, high temperature aging room, vibration tester, waterproof tester, anti-static & dust-free workshop etc. Possessing advantages of own LED production chain, Adhering to "Life-force lies on quality; Competition lies on service", together with technical and managerial talents we can provide our customers with high-quality products with most competitive prices.
Our company's infrared wireless public address system technology has obtained the national patent of utility model (the patent number: ZL 2007 2.0055874.2)For universities, the middle school, elementary school's different needs, the company has developed six series of the past more than 20 type products, And all products have passed the national quality authentication (the 3C authentication).
   Our company manages the idea is: ??ll for wireless universal mission to alleviate for the purpose of teachers to improve students achivement responsibility,lifelong education to serve the people.??in line with ??he quality first, serves first, the prestige is supreme??the principle, we are willing to cooperate with all quarters friends sincerely, creates magnificently!