This particular *kit is for a Three fan unit meant to cool your cabinet, multimedia center, aquarium, home grow op, brewing project or whatever else that may need cooling, the only limit is your imagination! These fans move a combined 138 cubic feet (WxHxD) of air per minute (CFM) which is good for 2-6 components (up to 20 cubic feet of space with 2-4 shelves) Can be mounted on any side of a cabinet, where room permits (cutout dimensions below). INCLUDES: (3)**Ultra Quiet & Reliable Nidec GentleTyphoon 120mm 1450RPM Dual Ball bearing Fan (1) Coolerguys Programmable Thermal Controller with LED Temperature Display This controller comes with a 24" (610mm) long probe, place where you'd like to monitor the temperature, when the temperature reaches the temperature you have programmed as the "On" setting the fan and anything else plugged into the unit will be activated until the temperature falls below the programmed "Off" setting. It natively supports up to 4 3pin connections (12v only) but can handle more with the appropriate splitters (maximum 1.5A) Temperatures above are (+/- 1° F) / Programmable range of 40F (4C) to 145F (63C) / LED display can be toggled on/off (1) Coolerguys 2A 100-240V AC To 12V & 5V DC Power Supply with 4pin Molex plug This is how the fan and thermal controller can run from a standard wall socket, since it is 100-240V AC powered it can be used in any region if you use the appropriate plug, this kit ships with a standard US 2 prong plug however we also have EU type C and UK (BS 1363) power cords available Cutout size: 16" x 5" (400 x 130mm)