The HHTX-103 is an on-off key (OOK) high performance, long-range transmitter operating at 915 MHz. This keyfop transmitter is primarily intended for use in Part 15.231 systems. The transmitter is synthesized and ideal for high volume OEM applications. It requires one 12 volt battery. The HHTX-103 is a well designed transmitter that is suitable for a variety of RF applications.