This is the Futaba Trainer Box. Designed for training student pilots only and does not include or require a crystal, battery pack, antenna, charger or any flight pack components. **** THIS CANNOT BE MADE INTO A WORKING TRANSMITTER BY ADDITION OF THE **** **** ABOVE ITEMS. ***** FEATURES: Allows new pilots to practice with confidence knowing that the instructor can assume control when a tough situation arises Compatible with any Futaba FM, PCM and 2.4GHz aircraft radio system **NOTE: The trainer function is inhibited in the software of the **radio system. **User must consult the radio system manual to activate the **trainer function. One year limited warranty INCLUDES: Futaba Trainer Box with micro style trainer jack and instruction sheet REQUIRES: Trainer cord, Micro to Micro Plug FUTM4415, OR Micro to Round Plug, FUTM4420 COMMENTS: This box has a battery compartment but no batteries are required. The instructor"s transmitter supplies power to the trainer box. jxs 8/07/08 ir/jxs