Overview Cellock-brand time-proven build quality & reliability Creates enough interference to block all cell phone signals around you (GSM 869 Mhz~960 Mhz/CDMA 850 Mhz~960 Mhz/DCS 1805 Mhz~1920 Mhz) Fully metal construction
- creates a solid & techie feel Creates a 0.5M ~ 15M (about 2 to 40 feet) radius of cell phone signal black out area Built-in 1500m Ah battery lasts 3 to 4 hours, also works & charges on AC & Car 12V power with including adaptors Class rooms & small seminar halls Meeting rooms & board rooms Private offices Bus & vehicles (imagine how you can finally have a good undisturbed nap)VIP & privacy-sensitive senarios