3U low noise heat extraction unit Extracts hot air Fitted with 12DC motor Built-in thermal sensor CD in/out sockets 3U low noise heat extraction unit. This unit is designed to be fitted to the front or back of a 19 inch rack to extract hot air. Each unit is powered using a 12V DC input. A thermal sensor CRC-TEMP plug in is also available as an optional extra. The fan units have a low nose rating of 22.5dBA and are can move 200CFM (336m/h). 2 x DC In/Out Sockets. Temperature Sensor Socket. DC in/out sockets. 500mA world wide universal PSU supplied. Dimensions: (OD) 483mm x 133.4mm x 55mm (19" x 5¼" x 2¼") Weight: 1.5Kgs Power: 12V DC - 500mA Warranty: 2 Year