Features: 1. This series cover six or eight frequency bands or with bigger jamming distance; 2. This device utilizes a unique low power radio signal technology that interferes with the communication between wireless handsets and base station; 3. Block all cellular phone, gps tracker, lojack sytem, car remote control communication , in you controlled area or to avoid information from being disclosed secretly during meeting, and yet it is jamming silently without user¡¯s awareness; 4. Easily operated and user-friendly, no hassle installation needed, need no professional knowledge or skill, a diy designed device to suit everyone , everywhere and anytime; 5. Low output power will not cause harm to human body or medical equipment; Application: 1. Hospital, medical center or where medical instruments should not be disturbed by cellular signal; 2. Theater, cinema, museum and art gallery; 3. Conference rooms, offices, libraries, schools and restaurant; Cpj-3040: Fgsm900+cdma800+iden/nextel800, gsm850+dcs/gsm1800 +pcs/gsm1900+3g(umts)2100+433+315+lojack+(4g lte/4g wimax is optional); Cpj-30401:gsm900+cdma800+iden/nextel800, gsm850+dcs/gsm1800+pcs/gsm1900+3g(umts)2100+ gpsl1 1575+ lojack+(4g lte/4g wimax is optional); Cpj-30402: gsm900+cdma800+iden/nextel800, gsm850+dcs/gsm1800 +pcs/gsm1900+3g(umts)2100+ gpsl1 1575+ vhf+uhf+(4g lte/4g wimax is optional);
