Shenzhen Hualian information Technology Co., LTD is a developer, manufacturer and reseller of signal jamming devices company. We provide wireless signal communication products such as prison jammer, backpack jammer, bomb jammer, drone jammer, UAV jammer, cell phone jammer, GPS jammer, WiFi jammer, vehicle jammer, wireless signal detetcor, mobile signal booster and GPS trackers for all over the world. The company has an excellent R&D team - we have focused on prison intelligent shielding system, anti-terrorism communication jamming system, and anti-terrorism security system for more than five years, and have done R&D and installation of high-end communication jamming and detection systems for the world. The company has a strong R&D team and is recognized as a research pioneer in the field of electronic shielding and electronic countermeasures research.