The Multi-Tech MultiModem GSM/GPRS is an external data/fax/voice wireless modem. Designed for global use, it offers standards-based multi-band GSM/GPRS Class 10 performance. This ready-to-deploy, standalone modem allows developers to add wireless communication to products with a minimum of development time and expense. The MultiModem GSM/ GPRS is based on industry-standard open interfaces, is fully type approved, and can be desktop or panel mounted.The MTCBA-G-F2-AWS-NAM is a GSM/GPRS Class 10, 850/1900 MHz modem for AT&T networks. This package includes AT&T SIM, antenna, serial cable, mounting tabs and AC power supply with US cord.