Product Description Universal Voltage Power Pack, 100-277 VAC. From the Manufacturer The HBA UVPP Universal Voltage Power Supply is covered by a five year limited manufacturer warranty, and is sold one item per package. The Universal Voltage Power Pack is a self-contained transformer and relay that is designed to eliminate the guesswork in choosing the correct power pack to use with low voltage 24VDC occupancy sensors. The power pack supports and automatically detects input line voltage from 100-277VAC, eliminating the need for voltage-specific power packs or power packs that require special wiring based on the input voltage. The Universal Voltage Power Pack is capable of switching 20A loads and features Zero Arc Point Switching technology that minimizes relay contact wear associated with high inrush loads. A single power pack can be used to supply power to up to four sensors, and can also be used to supply power to the MPSA auxiliary relay for multiple circuits. The Universal Voltage Power Pack is plenum rated and mounts easily inside or outside a junction box. For indoor use only, the pack operates in temperatures of 32 to 104-Degree Fahrenheit (0 to minus 40-Degree Celsius), and relative humidity of less than 95-percent, non-condensing. The black power pack's dimensions are 3.69 by 2.33 by 1.36-Inch, and includes a mounting base. Hubbell Building Automation is a strong proponent of innovative, integrated and simple energy saving lighting controls.