Three large fans, ball bearing construction for long life Two Turn Off Modes, instant turn off or 10 minute delayed turn off Three user-selectable fan speeds High air flow, greater than 90 cubic feet / minute at max speed Three auto turn on modes, 12 Volt DC trigger, 120V AC or front panel button Auto turn on mode disables front panel power button Extra-quiet design, less than 33 dB noise Switchable 115v / 230v operation 1U half-rack space chassis (W x D x H): 9 ½" x 9" x 2 ¼" / 1 ¾" without feet (W X D x H): 242mm x 229mm x 57.5mm / 44.5mm w/o feet
