It and GPRS, DTMF, TTS voice broadcast and other functions in one shield module, the operating frequency of EGSM 900MHz / DCS 1800MHz and GSM850 MHz / PCS 1900MHz.
It also supports direct text UCS2 coded data and data formats, allowing your robot at any time speech synthesis and TTS voice broadcast. It supports DTMF, when the DTMF feature enabled, you can be during a call press the keys into characters back to the company can be used for remote control.
It is controlled via AT commands, you can start it directly through the computer serial port functions and Arduino board. The SIM800H GPRS Shield plate embedded SIMCom SIM800H chip companies with good stability.

• It and GPRS, DTMF, TTS voice broadcast and other functions in one shield module, the operating frequency of EGSM 900MHz / DCS 1800MHz and GSM850 MHz / PCS 1900MHz.
• It also supports direct text UCS2 coded data and data formats, allowing your robot at any time speech synthesis and TTS voice broadcast.
• It supports DTMF, when the DTMF feature enabled, you can be during a call press the keys into characters back to the company can be used for remote control.
• The SIM800H GPRS Shield plate embedded SIMCom SIM800H chip companies with good stability.
• More feature upgrades, application scenarios, refer to the instructions SIM800H chip.

It and GPRS, DTMF, TTS voice broadcast and other functions in one shield module, the operating frequency of EGSM 900MHz / DCS 1800MHz and GSM850 MHz / PCS 1900MHz.Haweier