Guys, We have published an updated firmware version 1.1 for the M12M Replacement Receiver that is available from the support page of the Jackson Labs website: www.jackson-labs.com/index.php/support The updated firmware is available under Firmware Downloads and a description of the improvements are listed under the ECN section. You can also find firmware update instructions on page 39 of the user manual here: http://www.jackson-labs.com/assets/uploads/main/M12M_replacement_UserManual.pdf The main improvement is correcting a problem with the LED display that will cause the display to malfunction during continuous use. With this problem, only the LED display is affected, and the unit will otherwise continue to operate normally. Let me know if you have any feedback or questions. Thanks, Keith