More information on the problem with the locking mechanism can be found in this article.
Excerpt from the press release on the new carrying system:
PIEPS has received inquiries about the DSP PRO, DSP PRO ICE and DSP SPORT avalanche transceivers. These models all have the same slide switch and locking mechanism to switch the device into transmit mode. These requests are related to two avalanche accidents in 2017 and spring 2020. Following these accidents, allegations were made that the slide switch and locking mechanism of the DSP PRO and DSP SPORT had not withstood the stresses of the avalanches. However, subsequent investigations have shown that the slide switch and locking mechanism of the DSP PRO, DSP PRO ICE and DSP SPORT comply with all applicable safety standards. Product safety and customer confidence in its backcountry products is an absolute priority for PIEPS. For this reason, the company has decided to implement a voluntary product improvement measure. To this end, the R&E team has developed a new hard case carrying system for all DSP series avalanche transceivers to make the slide switch and locking mechanism of its DSP series avalanche transceivers even safer. The design of the new Hardcase Carrying System ensures that the DPS PRO, DSP PRO ICE and DSP SPORT avalanche transceivers remain securely locked in the "SEND" position during use. The new hard case carrying system replaces the neoprene carrying system that was previously supplied with the DSP devices. The neoprene carrying system supplied with the DSP series avalanche transceivers should no longer be used. The affected DSP devices were manufactured between 2013 and 2020.
