workshops to install cell phone jammer

Superconductors is completely anti-magnet, with the best static magnetic shielding effect, but is still not widely used for electromagnetic shielding electromagnetic field propagation in conductive media, the field quantities (E and H) amplitude with distance increases exponentially decay from the energy point of view, electromagnetic wave propagation in a conductive medium energy loss, therefore, the amount of the performance of field amplitude decreases. the largest conductor surface field, the more in-depth internal conductors, the amount of field The smaller a phenomenon also known as skin effect.  china cell phone jammer only interferes with the downlink and will not influence the base station with effective divisions. skin effect prevents the use of high frequency electromagnetic wave penetration made into a good conductor and electromagnetic shielding device it than static, static magnetic shielding more general electromagnetic shielding is to prevent interference enhance equipment reliability and effective means to improve product quality.
In the near-field region, the leakage of holes with the characteristics of the radiation source.   cell phone jammer can block such cell phone signals as GSM/CDMA/AMPS/DCS/PHS within the radius range of 1-25m.When the radiation source is the electric field source, the leakage of holes than the far field when the small (high shielding effectiveness), and when the radiation source is the magnetic field source, the leakage of holes larger than when the far-field (low shielding effectiveness).
Data transmission channel to allow three simultaneous synchronous voice channels, each bandwidth of 64kb / s; voice and data can also be mixed in a channel, a 64kb / s simultaneous voice connections and an asynchronous data connection. Network connection using encryption, password authentication used to connect devices at the same time, both with seven other devices within the network constitutes a Bluetooth Micro (Piconet), 1 a Bluetooth device can simultaneously join eight different micro-network, respectively, each micro-network 1Mb / s of transmission bandwidth, when two or more devices to share a Channel, it can constitute a Bluetooth piconet, a device by which the dominant traffic, when the device is not yet a Bluetooth piconet, it first enters standby the state.