GPRS Module GPS Module GSM Module A7 SMS Speech Board Minimum System Board

- Working frequency: quad-band network, 850 / 900 / 1800 / 1900MHZ
- Working voltage: 5VDC- Working Current: maximum of 2A
- Sleep Current: 5mA
- Onboard Micro SIM card holder, you can install Micro SIM card
- Onboard Micro USB interface for external power supply
- Communication Interface: TTL serial port
- Baud rate: 115200bps and it can also be set by AT command.
- GPS serial port baud rate: 9600bps, GPS_TXD can output NEMA information
- Interface logic voltage: 3.3V
- Make and answer phone calls using a headset and electret microphone.
- Send and receive SMS messages.
- Send and receive GPRS data (TCP/IP, HTTP, etc.) .
- Be used to test the Ai-Thinker GPRS / GPS A7 module
- Pin pitch: 2.54mm
- Onboard antenna interface: SMA

About the Antenna:
- Suitable for SIM800L GSM modules / Arduino SIM900 GPRS Shield
- Frequency: 780MHz ~ 960MHz 1710MHz ~ 2170MHz
- Antenna gain: +2.0 ± 0.7 dBi @ 880 MHz, +2.0 ± 0.7 dBi @ 1800 MHz
- S.W.R <= 2.0 @ 2100 MHz ~ 2500 MHz
- Output Impedance: 50 Ohm
- Antenna interface: SMA