The White Dual 4 in. 3-way Indoor/Outdoor Speakers produce sound beyond their expectation. The size and mounting capabilities make them an ideal solution for your audio needs in virtually any application. The 200 watt power handling allows for a match with virtually any power source. The anchors and screws to attach the speakers are not included and must be purchased separately. The hardened steel brackets are suitable only for attaching the speaker to walls or ceilings constructed of solid wood, brickwork, concrete, hollow buildings block, or wood studs.