HAC-UM Series RF Module ManualVersion 2.3CSHENZHEN HAC TELECOM TECHNOLOGY CO., LTDAddress : Fl.6, Building 2, Jiuxiangling New Industry Park, No.4227, XilihuRoad, Nanshan, Shenzhen, China.Tel : +86-755-23981078 23981077Fax : +86-755-23981007E-mail : webmaster@ rf-module-china.comWebsite : http://www.rf-module-china.com