OSD ICE620ST 6.5" 70V Commercial In-Ceiling Speaker w/Back Can (White, Single) 8 Ohm with 70V transformer built in; Wattage taps: 10W, 5W, 2.5W, 1.25W 6.5" Polypropylene cone woofer; 1/2" PEI dome tweeter Standard frame in-ceiling speaker with back can Frequency Response: 60Hz- 22kHz, Sensitivity: 88db Dimensions: 9-1/2" x 5-1/2"; Cutout: 7-7/8" 10 Year Warranty