NBT GROUP (HK) Co.,Ltd. is the largest and most professional company which is engaging in mobile phone jammer device. The company was established in 1993 and grew fast in few years. With more than 10 years of experience, we have been designing and manufacturing update jammer device and system. There is a full line of cellular jammer products from low-power portable units to high-power units. The price of our various products is the most competitive in the market. Timely delivery, guaranteed quality, competitive price, customized service and technical support is the key point to choose us. We look forward to a future that works better for you.