Features: QuietMode: At 500 cfm range hood to operate at a reduced sound level of 1 Sone. Powerful Twin Motors: Low Speed 640 cfm (2.8 sones) Medium Speed 720 cfm (4.5 sones) High Speed 800 cfm (4.8 sones) Choice of horizontal (top) ducting in 6", 7" or 3-1/4" X 10" or vertical (rear) ducting in 3-1/4" X 10" 18-gauge frame and seamless design Time Delay Controls Four Speed Control Bright Halogen Lights: Two 20-watt halogen lights for 30" and 36", or three halogen lights for 42" and 48". No Filter Needed Four oil containers #304 Commercial Grade Stainless Steel - Satin Finish Accessories CH1120DC Duct Cover, 30" Back Panel (SSP30) and 36" Back Panel (SSP36) can be purchased separately. Model: CH7942SQ Power Supply: 120V / 60Hz Number Of Motors: 2 Fan Type: Turbine Impeller Detachable Oil Containers: 4 (Under & Behind Impellers) Halogen Light: 42" 12V 20W x 3 Chimney Duct Cover: Adjustable 2 Piece Duct Cover Extend From 14-1/2" to 27-1/2" Speed: 4 Dimensions (in.): 42" (W) x 22" (D) x 9" (H)