We are Shenzhen Huidetong Technology Co., Ltd. based in Shenzhen , China.Our business is related to Telecommunications industry and we specifically deal in signal jammer, filing cabinet. Please find our product details below:Prison Jamming SystemDetailed Product Description1. 2011 New Designed Prison Jamming Model2. 4 working bands for option3. Strong Output power: 240W4. Rain proofSell Military Portable Cell Phone signal JammerDetailed Product Description1. Military Portable Cell Phone Jamming2. Max output power up to 400W3. 4 working bands4. Jamming range about up to 500mSell portable cellphone signal jammerDetailed Product Description* Portable Mobile Phone Signal Jamm* Total Output Power: 2.7W* Jams simultaneously up to 3 selected frequency bandsThank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.