SIM900 Module 4 Frequency Development Board

Features:
-Quad-Band 850 / 900/ 1800 / 1900 MHz – would work on GSM networks in all countries across the world.
-GPRS multi-slot class 10/8.
-GPRS mobile station class B.
-Compliant to GSM phase 2/2+.
-Class 4 (2 W @ 850 / 900 MHz).
-Class 1 (1 W @ 1800 / 1900MHz).
-Control via AT commands – Standard Commands: GSM 07.07 & 07.05 Enhanced Commands: SIMCOM AT Commands.
-Short Message Service – so that you can send small amounts of data over the network (ASCII or raw hexadecimal).
-Embedded TCP/UDP stack – allows you to upload data to a web server.
-RTC supported.
-Selectable serial port.
-Speaker and Headphone jacks.
-Low power consumption:1.5mA(sleep mode).
-Industrial Temperature Range: -40 to +85 degree.