This upgrade provides additional non-volatile memory storage for RC210 pc boards earlier than Version 3.5 and is necessary in order to obtain all the features offered in Firmware 7.39 and later.
This board is easily added to your existing RC210 (soldering required) or you may return your RC210 to us (pc board only and we'll pay for the return shipping).
Note: You must have the new ATMEGA2561 CPU and Firmware 7.39 or later in order to use the addtional memory this option provides