http://www.hk-aoli.com/goods.php?id=545

Specifications

This 3G cellphone signal jammer which comes in palm size is very easy for you to carry around

The 3G cellphone signal jammer is designed with an effective detecting and blocking range of 10-20 meters

This WIFI signal jammer can effectively block cell signal up to 20 meters away

The 3G cellphone signal jammer is suitable for many places, so that you can use it in the classroom to keep quiet and you can also apply it to your workplace to block those annoying signals

The portable signal jammer is certain to bring convenience and practicality to your life

Block Signals 850-960MHz,1805-1990MHz, 2400-2500MHz

Output Power 3W 

Jamming RadiusUp to 15-20 meters (Signal -75dBm)

Power supply AC adapter (AC100-240V    DC12V)

Charger Including Car charger and Charger Adapter 

Working Time 60minuters

Size 112 x 60 x 28mm 4.4 x 2.4 x 1.1in L x W x H

When the jammer need to charge, the charger LED will become red

Package Included

1 X Cell Phone Signal Blocker

1 X 100 -240V AC Charger

1 X Car Charger