The product can provide voice communications service in the outdoors by taking advantage of GSM wireless network.
Technical parameters:
1.Working frequency:900/1800MHZ(double bands), 850MHz/1900MHz available
2.Support GSM phase2 standard
3.Power dissipation:<1W for standby,<4W for working
Features:
1) Make local calls, domestic long distance and international calls; charge the fee with valid card
2) Make free calls or emergency calls, eg: 110,119 without card
3) Working under the supervisor of management system
4)Long-distance centralized management, setting or modifying parameter and rate via SMS