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New Design Mini Cellphone Jammer Blocking GSM CDMA Dcs 3G 4G WiFi. Multi-Band Blocking: Blocks GSM, CDMA, DCS, 3G, 4G, and WiFi . Portable Mini Design: Compact dimensions 110x62x18mm with built-in battery and antenna. Long Battery Life: 1050mAh battery provides 80 minutes of continuous usage. Dual Power Source: Supports AC charger and car DC charger for flexible operation. Customizable Frequencies: Supports customization for 2G/3G/4G/5G, GPS, and other bands. Versatile Applications: Ideal for schools, offices, exams, meetings, and libraries. Rapid Signal Restoration: Phones automatically reconnect immediately after jammer is turned off. OEM/ODM Service: Full customization and flexible options available for clients.