Overhead Ionizer Air Velocity 100 to 200 cfm Static Discharge Time 3.5 sec Depth 3 15/16 in Features 2 ft x 4 ft Coverage Area 700 lumen Light Panel Low Offset Voltage Three-Speed Fan Tungsten Emitters Includes Certificate of Calibration Hanging Kit Power Cord Length 22 5/16 in Manufacturers Warranty Length 1 yr Product Type Overhead Standards NIST Calibrated Width 6 5/8 in Maximum Distance from Charged Surface 18 in Voltage 120V AC