The NEO-6M V2 GPS receiver is based on the famous and high end u-Blox Neo-6M GPS module. It comes with small battery for hot-start, and there is built-in EEPROM too. To offer better signal reception, there is external ceramic antenna that connect to the board via U.FL connector! It can operate from 3.3V to 5V system, so all those 5V Arduino board (CT-Uno, Maker-Uno, Arduino-Uno, Mega, Leonardo and many more) and 3.3V controller that include Arduino and Raspberry Pi, work perfectly with this GPS module