How to make mobile phone jammer | gsm blocker jammers how to build

How to make mobile phone jammer,gsm blocker jammers how to build,Basic Info Model NO.: CPJP8 Operating Temp: -20 to +50oc; Antenna Type: Omini-Directional Jammer Type: Sweep Jamming RF Power Output: 3.5 Watt Car Charger and Charger Adapter:...