multifunction desk14 antennas mobile phone signal jamm ers shields gps wi-fi 2.4ghz 5ghz lojack uhf/vhf cdma gsm2g/3g/4g/5g signal, Silver

all-in-one jamm er is power full to blocks all the signals, jamm ing frequencies the jamm ing radius up to 60meters,longtime working on ac adapter or connet with car battery dc 12v moving used. it can be applied at meeting rooms, conference rooms, museums, galleries, theatres, concert halls, churches, temples, restaurants, classrooms, training centers, factories, banks, trains, bus and more places that require silence, confidentiality and information security ability to jam all popular frequencies around the world at the same time,silencers can be adapted to different countries,you can set the parameters manually - if you do not want to jam any signals, you can turn them off.syi