The Transducer 10-SMD Module is included in the package for convenience. It is recommended to set the temperature of the transducers to -40°C~125°C to ensure reliable operation. The transducers are capable of operating well at 3V~12V supply voltage. 125°C is the maximum operating temperature of the transducers. It is not possible for the transducers to operate at temperatures lower than -40°C. This device must work at 60mV voltage from the transducers. In order to keep the transducers at the temperature they are rated for, the DC voltage needs to be 3V.