2-Way Indoor/Outdoor Speaker with transformer:Power Capacity:70WattsFrequency Range: 100Hz-20kHz Impedance:8 OhmSensitivity:89dB Woofers: 5 1/4" PP coneTweeter: 1/2" Dimensions(HWD): 178x240x162mmTransformer:16W-8W-4W-2W-8Ohm 70V or 100V