Gowoops GPS Module with TTL Ceramic Passive Antenna for Arduino Raspberry Pi 2 3 B+ MCU This is a small size item, and it has excellent performance. This item has data backup battery and LED signal indicator. Comes with 25 x 25mm ceramic passive antenna, strong star search ability. Various parameters can be set via the serial port, and can be stored in the EEPROM, easy to use. Compatible with 3.3V / 5V level, convenient for connection to a variety of microprocessor systems. Built-in rechargeable backup battery, you can keep the ephemeris data when power down.