Cover interface frequency:

WIFI:2400-2500MHz

Total output power: 0.4Watt 
Effective range: Radius Up to 10 Meters. The signal strength <=-75dBm in the location, the jamming Radius still depends on the strength signal in given area

Whole Weight: 68g. 
Work time: 150 minutes, this kind of jammers can continue to work when charging, 
Support Powered by car cigarette charger

Advantages:

A: Look like Mobile Phone.  More hidden. 
B: Internal Insulated Antennas 
C: Replace Battery by hand, same like mobile phones. 
D: Charging battery with Nokia charger. 
E: High Quality Design, Low heat anticipation, Continues operation. 
F: Can continue to work when charging.