12 Volt DC Axial Brushless Ball Bearing FanProduct Detail:Built-in function to send an alarm signal when the fan motor revolutions slow down.The on-board sensor (yellow lead) sends a signal to cut off the system power supply by this alarm signal according to its sensor type.Voltage: 12 Volt DCWatts: 9.5 WattAmperage: 0.71 AmpFrame Material: ABS PlasticDimensions: 4.7″ x 4.7″ x 1.5″ (120mm x 120mm x 38mm)Sensor Type: Speed Detection Type (Reverse Output Waveform)Approvals: UL Listed, CSA ListedNidecJapan Sevo Company, Ltd CNDC12Z4SQ-965