The Pyle PWRC81 8" Weather-Resistant In-Ceiling Speaker System (Pair) offers an 8" polyproPylene woofer with santoporene surround and a 0.5" polycarbonate tweeter. The speakers are weather resistant and are designed for installation in settings where moisture might otherwise ruin a traditional speaker. Frequency response is rated at 55Hz to 22KHz and peak power is rated at 400W. The unit is designed for placement in a ceiling and a cutout must be made to accommodate the dimensions of each speaker. This unit includes (2) speakers.