Shure PS60US Power Supply Energy-Efficient Switching microphone boom The built-in headphone output includes

The built-in headphone output includes a direct monitoring feature

The Smart Fan system is dependent upon the internal ambient temperature of the unit and runs at high or low levels depending on the amplifier’s cooling needs

Sound activation

And when it comes to frequency selection

Shure PS60US Power Supply Energy-Efficient Switching microphone boom The built-in headphone output includesThe Shure PS60US Power Supply Energy Efficient Switching. The PS60US Power Supply from Shure replaces the PS45US power supply and is designed to cut consumer utility costs. It sets a higher standard of energy efficiency. It is now level 6 energy compliant. The 15V DC in line power supply adheres to energy efficient power standards. Product Specifications: Type: Shure Power Distribution Power Supply Input Voltage Range: 100 240V AC, 50 60Hz Output