The sensor has a built-in voltage regulator chip that supports a 3.3~5.5V wide voltage operating environment, which means it can work even at 3.3V. Most modules only require an external ADC (analog to digital) converter module to work.
Chip is TL555
Operating Voltage: 3.3 ~ 5.5 VDC
Output Voltage: 0 ~ 3.0 VDC
PH:2.54MM