HONGTONGDA ELECTRON IS A HIGH-TECH ENTERPRISE. OUR FACTORY LOCATED IN SHENZHEN, WHICH THE MANUFACTURING BASE ON PRDUCTS MAINLAND OF CHINA. SPECILIZE PRODUCE FULL RANGE CELL (MOBILE) PHONE SIGNAL DEVICES, INCULDING MOBILE JAMMERS, AMLIFIER (REPEATER) AND ANIT-VIDEOTAPING EQUIPMENT. ...