Highlights: Taking use of super-high frequency & mini-power ubterferebce tecgbikigt, high efficiency Effectively making subsections just interfering downlink & no interception on the case station Extreme portability, the weigh for machine itself & antenna is just 150g Low power consumption, working time for machine is about 2-3 hours, wupplied power by battery Slow start up design of circuit, these elements can maintain the stable operation condition with high integration Perfect for the following senarios: 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 Specification: Type A:CDMA:870-880MHZGSM:930-960MHZDCS:1805-1920MHZType B:GSM:869-960MHZDCS:1805-1920MHZ3G:2110-2170MHZPower supply:AC220v-DC5 V Built-in battery:1500m A/h Energy consumption:0.5W/h Weight Approx:103g Size Approx:10.5 x 4.5 x 1.9 cm Package Contents:1 x USB (Universal Serial Bus) Cable 1 x User Manual 1 x Universal Charger 1 x Car charger 3 x