The GSM Modem w/USB Connection allows you to send text message alerts over any GSM/GPRS/ EDGE network from AVTECH’s Device ManageR software (with Dial Out Plugin Bundle). This compact 3G/2G modem connects directly to Device ManageR’s host system by a USB 2.0 connector, which also provides power to the modem. It requires a SIM card (mini-SIM), which you may obtain from your cellular service provider.