ublox/u-blox NEO-6M GPS module with antenna and build-in EEPROM This module is compatible with APM2 and APM2.5, and EEPROM can save all your configuration data. Interface: RS232 TTL Power: 3-5v Baudrate default:9600bps With battery The battery Model is MS621FE,Need to weldin You can download the test program directly from ublox official website(u-center version 6.31 download (internet connection is required for installation)). DOWNLOAD: www.uctronics.com/download/U0644_GY_GPS.zip