YuLongDa (Hong Kong) Technology Co., Ltd. has been developing wireless products for years. 8 years ago, we developed the first Made-in-China 3G USB module, leading in the market. 5 years ago, we were devoted to GPS industry. Now we have products including GPS trackers and LBS trackers for vehicle, motor, personal, pet, etc. Notice: We have some changes in HR, below list sales people have left our company: Anson Chen, Lisa xie, Daniel Cao. They won't represent our company more for any ...