... ■Power Supply: AC adapter (AC100-240V DC5V12A) ■Shielding Radius: Up to 40 Meters (depending on the mobile service provider's network ... Reviews:1.the jammer looks on peoples faces are easily worth the price.Works exactly as promised, and was delivered on ... I have more orders, looking forward to our further cooperation.3. Portable,excellent,it's worth to buy.4. Excellent seller, honest, fast ...