4G technology expo kicks off in Chicago
Visitors listen to the introduction of the mobile broadband technology of Huawei Technologies Co., Ltd. during the 4G Expo in Chicago, the United States, Oct. 19, 2010. The three-day expo kicked off here on Tuesday with the participation of some 150 top 4G companies from around the world. (Xinhua/Jiang Xintong)
An exhibitor shows an electricity meter using 4G communication technology during the 4G Expo in Chicago, the United States, Oct. 19, 2010. (Xinhua/Jiang Xintong)