8 Antennas Portable Cell Phone Signal Jammer Block Mobile WiFi and More


  • Block cell phone signal(2G to 4G), Wifi, GPS, LOJACK
  • Jam up to 20meters
  • Up to 150 minutes of jamming
  • Car charger included
  • With DIP switch design, any signal band can be turned off without affecting other functions
SKU: JM021 Category:

JM021-LG: Full Bands Mobile Phone 4G/3G/2G +WiFi2.4G+ GPSL1+LOJACK

JM021-G: Full Bands Mobile Phone 4G/3G/2G +WiFi2.4G+ GPSL1+GPSL2


JM021 signal jammer from Jammer Master is your all-in-one solution to blocking unwanted mobile phone signals, Wi-Fi, GPS, LoJack, and more. This powerful jammer is designed with 8 antennas that can effectively block all types of Android phones, tablets, iPhones, Windows phones, and smart devices that use 2G, 3G, and 4G signals, as well as GPS L1, LoJack, remote control frequencies at 315MHz and 433MHz, and Bluetooth and Wi-Fi wireless signals.

The JM021 is a portable and easy-to-use jammer, making it an ideal tool for a variety of applications. Its bigger Ni-Mh battery has a capacity of 8000mAH, allowing it to work continuously for up to 2.5 hours without needing a recharge.

This jammer is quickly becoming a popular choice for those who need to maintain privacy or security in a variety of settings. Its powerful jamming capabilities and ease of use make it an ideal tool for anyone who wants to keep their private conversations and data safe from prying eyes.

Get your JM021 signal jammer today and experience the peace of mind that comes with knowing your private conversations and data are safe from unwanted interference.


Output Power:Total 5.6W,0.7W each band

Jam Radius:2-20meters

Power Supply:AC110-240V to DC12V

Cooling System:High efficiency aluminum alloy radiator, Build-in 1 cooling fan

Working Time:Continue working 2.5 Hours

Product Size:156*83*48mm (not include antenna), Antenna Length:165mm Gain:2.0dbi

Product Weight: appr.1.7kg

Package Contents:Jammer Device x 1, AC Charger x 1, Omni-antenna x8, DC12V car charger x1