This is SIM900A GPRS GSM Module from the category Modules | GSM/GPS.Range of the power supply: 3.7 to 4.8 voltsDefusing current: 4 mA50 mA operating current20 mA for standby currentCurrent at peak emission: 2ANote that the chip is used.Includes one SIM900A module in the package.Note: Import Dukan Pu..