LTE 4G jammer: Full-function copy broadband jammer(All broadband shielding instrument) named multi-function signal shield instrument of investigation instrument, my company is researching and developing a new generation of green low-frequency and cell phone signal jammer, only all cell phone interference in the investigation room (CDMA, GSM, DCS, PCS, TD-SCDMA, UMTS/3G,4G ), has all kinds of stealth, intercom, etc. All communication signal reception, no impact on the surrounding communication. The cell phone jammer can block any signal within 2-50m (depending on the communication signal strength) in the occupies the output range of all types of cell phone (3G), bone conduction headphones, erasers, rulers, watches, glasses to probe, such as digital tools. Bluetooth, wireless remote control. Radio signals, such as shielding, shielding all within the perimeter of the mobile phone. Completely interrupt all the signal to give you a fair testing environment.