Pipes and Black Diamond have observed a small number of devices with malfunctioning electronics. In this case, the device might not switch from send mode to search mode. If you own/use a Pipes or Black Diamond Avalanche Transceiver, please visit the link and follow the instructions to check if your unit is affected.
For full details, mode verification instructions and contact details please click here.
UPDATE: On 5 May, the German Alpine Club (DAV) shared an important update related to this safety check, highlighting that one sole check may not be sufficient.
Reminder: An archive database of equipment recalls and warnings communicated to the UIAA since 2009 can be found here.