SIM900A GSM GPRS Module with RS232 Interface and SMA Antenna Modem is built with Dual Band GSM based SIM900A modem from SIMCOM. It works on frequencies 900MHz. SIM900A can search these two bands automatically
SIM800L GPRS GSM Module Micro SIM Card Core Board Quad-band TTL Serial Port
SIM800A Quad Band GSM GPRS Module with RS232 Interface and SMA Antenna while enables easy connection with the computer or laptop using the USB to Serial connector or to the microcontroller using the RS232 to TTL converter.
SIM900A GSM GPRS Wireless Extension Module with Antenna-V4.0
Ublox NEO 7M GPS With Compass for APM 2.6/2.8 and Pixhawk 2.4.6/2.4.8
SIM868 Quad-Band GSM/GPRS and GNSS Module is a complete which combines GNSS technology for satellite navigation.
SIM808 Quad-Band GSM/GPRS/GPS Module is a complete Quad-Band GSM/GPRS module which combines GPS technology for satellite navigation.
SIM808 GSM/GPRS/GPS Module with GPS and GSM Antenna.
SIM800C GSM GPRS is a complete Quad-band GSM/GPRS solution in a SMT type, which can be embedded in the customer applications.