8341CA-DE five-channel cassette power mobile phone signal jammers : 5-channel power mobile phone signal jammers cassette compact body beautiful, single output power of 20W. Plate- directional antenna , interference radius . Effective segmentation, only the downlink interference will not cause interference to the base station. Imported components , slow -start circuit design to avoid sparking phenomenon generated by mechanical switch , good job stability. Suitable for large-scale or small meeting room open area . CDMA /GSM 900, GSM 1800, 3G, (4G should be incorporated whenever required, will be an add on module in the existing system) Output of the frequency of average output power channel output power