AC Infinity AIRPLATE S1 Cabinet Cooling Fan System 4 Inch 20 X 26 X 5 43" 11 mm Diaphragm 43" 11 mm Diaphragm Coating Carbon Active Noise Cancellation No Design In Ear (Intra aural) General Frequency Response 5 Hz to 45 kHz (Wireless) Sensitivity 100 dB at 100 mW Impedance 16 Ohms Noise Attenuation None Controls Microphone Location Earpiece Storage Capacity None Microphone Number of Mics 1 Type Condenser Pickup Pattern Omni Directional Frequency Response 100 Hz to 10 kHz Sensitivity 38 dB at 1 kHz 1 V Wireless Connectivity Supported Audio Codecs AAC and zoom in to focus on your most important areas [shortdesc] Features a multi speed controller to set the fan’s speed to optimal noise and airflow levels