Cellular + GPS tracking, all in one? Introducing Adafruit FONA 808 MiniGSM + GPS, an all-in-one cellular phone module with that lets you add location-tracking, voice, text, SMS and data to your project in an tiny package. This module measures only 1.75"x1.6" but packs a surprising amount of technology into it's little frame. At the heart is a powerfull GSM cellular module (we use the latest SIM808) with integrated GPS. This module can do just about everything. Onboard LiPoly battery charging circuitry so you can take your project on the go. Use any 500mAh+ LiPoly or LiIon battery and recharge over the MicroUSB when necessary. Two LEDs let you know when its charging and done Standard 4-pole TRRS headphone jack. Use any 'Android' or 'iPhone'-compatible headset with mic Breakouts for external 32Ω speaker and electret mic if you don't want to use a headphone Level shifting circuitry so you can run it with 2.8V to 5V logic. Vibrational motor (buzzer) driver so you can have noiseless notifications uFL connections for external antennas Indicator LEDs for power and network connectivity Standard SIM slides into the back On its own, this module can't do anything. It requires a microcontroller to drive it! We suggest and use an Arduino but any 3-5V microcontroller with a UART can send and receive commands over the RX/TX pins.