This module is compatible with APM2 and APM2.5, and the EEPROM can store all of your configuration data. Interface: RS232 TTL Power: 3-5v Baud rate Default: 9600bps No battery (this is not safe for airmail) Battery model is MS621FE, requires soldering You can download the test program directly from internet (u-center version 6.31 download (requires Internet connection installation)).
