Features: The new and original SIM800C module is an industrial-grade and multi-functional GSM/GPRS/Bluetooth module. With Bluetooth antenna interface, it can realize the transmission of voice, SMS and data information with low power consumption. With stable performance, compact appearance and high cost performance, it can meet the various needs of customers. The 5V-20V power supply is efficient and stable, and the power supply range is enlarged to adapt to various power supplies, which is convenient for professionals and project engineers to use. Support SMS, telephone, GPRS data, HTTP protocol support, DTMF decoding, MMS, recording function, Bluetooth, TTS function, etc. Specifications: Power supply: 5V-20V, when using 5V power supply, it can provide more than 2A current. Power interface: 2.54mm pin or MICRO USB interface. Suitable for Pi. Interface: TTL UART level interface Baud rate: adaptive (default), compatible with 2400-115200 SIM card socket interface: MICRO SIM card support Antenna interface: SMA, IPX antenna interface Working temperature: -45℃-80℃ Voice interface: 3.5mm voice microphone interface Size: 6.6*4.5*1.9cm Packing list: SIM800C GSM/GPRS module*1 The new and original SIM800C module is an industrial-grade and multi-functional GSM/GPRS/Bluetooth module. With Bluetooth antenna interface, it can realize the transmission of voice, SMS and data information with low power consumption. Support SMS, telephone, GPRS data, HTTP protocol support, DTMF decoding, MMS, recording function, Bluetooth, TTS function, etc. The 5V-20V power supply is efficient and stable, and the power supply range is enlarged to adapt to various power supplies, which is convenient for professionals and project engineers to use. With stable performance, compact appearance and high cost performance, it can meet the various needs of customers.