It can in the radius of 1 to 25 meters (about 10-250 square meters, can be adjusted according to the required place different field shielding range), internal partition GSM/CDMA/DCS/PHS/td-scdma/VCDMA/CDMA2000 / WIFI/LTE (4 g) signals...

The mobile phone has been unable to communicate. When you press the pull button, you will find that there is no signal on the signal indicator.The cell phone signal shield will not interfere with the normal work of other electronic devices...

Provide 360 degree jamming. Output Power Adjustable. Each frequency channel can be controlled separately. Frequency ranges selectable. Accept to customized low frequency. Prisons, Recording Studios, Banks, Contract Tendering Rooms, Churches, Classrooms......

This is a great signal blocker model that can easily be concealed in the pocket. Just like a phone. which is up to three hours of continuous use on a single charge. There are two possible ways to charge this handheld sized device On the go? There's the car charger...