Description: SIM800C is a four frequency GSM/GPRS module,for the castle hole package. Its stable performance, compact appearance, high cost performance, to meet the needs of customers. SIM800C chip: SIM800C working frequency is 850/900/1800/1900MHz GSM/GPRS, it can achieve low power consumption.transmission of voice, SMS and data information. SIM800C size is 17.6 *2.3 mm *15.7, can be applied to a variety of compact product design requirements. Main characteristics: Four frequency 850/900/1800/1900MHz Short message FTP/HTTP, embedded TCP/UDP protocol DTMF detection, Bluetooth 3.0 (optional), USB interface.