1. Jam signal type: full bands mobile phone 4G/3G/2G +WiFi2.4G/5.8G+ GPSL1 +LOJACK 2. Jam radius:2-20 meters 3. Cooling System: high-efficiency aluminum alloy radiator, Build-in cooling fan 4. Built-in battery:7.4V/8000mAh 5. Product Size:16 x 8.3 x 4.6cm 6. Handheld design, 10 all-in-one frequencies blocking all cell phone signals, LOJACK GPS, Wi-Fi, RF signals 7. 7watt high output power and high gain antennas, Jamming range 2 to 20 meters (at-75dBm, depending on signal strength in given area) 8. with Nylon Cover Hang or wear on the arm or belt, easy to carry on 9. With DIP switch, can turn on/off any signal band without affecting other bands 10. With car charger, can used in car directly, 12V DC/AC power supply is also available