12-Band Desktop GSM Jammer

https://www.jammermfg.com/latest-12-antennas-adjustable-power-uhf-vhf-jammer-blocks-2g-3g-4g-wifi-gps-lojack.html

Tired of nuisance calls, WiFi snoopers, or malicious radio signals? This 12-band adjustable signal jammer blocks CDMA, GSM, 3G, 4G, WiFi, GPS, Lojack, UHF, VHF, and more. Whether you're at home, in the office, or on the road (with optional car charger), you can adjust the power and band with a convenient button to customize your defense.

Need a portable blocker: https://www.jammermfg.com/cell-phone-jammers.html