Introduction: SK-16A portable wireless phone signal jammer is the latest information security product, it can form an electromagnetism protection field around the user, thus prevent mobile phone from receiving and transmitting the mobile signals to the base station; thus it can prevent the secret information leakage through your mobile phone, and also eliminate the noise pollution. The cell phone jammers are now a necessity for law enforcement and private places to interrupt communications by criminals and terrorists, and also for accomplishing a more cultured society. Features of Sk-16A Portable Cell Phone Jammer ò Coolest and lowest priced jammer on the market. ò Portable, Small, Compact and Robust. ò Battery or Mains compatible. ò To keep you away from noise or disturbance of unexpected cellular phone calls or text messages (SMS) ò World wide compatible. ò To block cellular phone communication links within an effective area. ò No transmissions or receptions of cellular phone calls in coverage area. ò All specified frequency bands will be blocked simultaneously. ò For using at meeting rooms, conference rooms, museums, galleries, theatres, concert halls, churches, temples, restaurants, classrooms, training centers, factories, banks, trains, buses etc. ò Easy to operate. Important Note: After charging the Jammer you will see a green led light, however please recharge the Jammer two more times for full battery charging. The jamming area is influenced by the location of the cell tower and the obstacles between cell tower & the cellular jammer. It means that in normal condition if the distance is close between the cell tower & the cellular Jammer, it will have very less jamming area. Likewise, if there are obstacles & walls between the cell tower & the cellular phone, the jammer will give more jamming area. 20*19*6.6cm 0.3kg