V-Sign Sensor 2, REF VS-A/P/N, a component of Sentec Digital Monitoring System (model SDMS).
The sensors may experience an out-of-box failure because after recalibration, the sensors stayed in the software mode "production" and were not reset to "released" mode.
US Nationwide distribution in the states of CA, FL, IL, MA, MS, MT, NV, and TX.
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-1980-2023