All Atlas Sound Strategy Series speaker systems are designed to provide high fidelity, long life and installation convenience for commercial and residential applications. Because of their weather-resistant properties they are perfect for use indoors or out. The Atlas Sound Strategy Series surface mount speakers are available in 4", 51 ⁄4", and 8" woofer sizes for 70.7V / 100V / 8Ω systems, finished in black or white. Use surface-mount AtlasIED SM42T Series speaker systems for commercial, professional and residential applications or where high-fidelity sound and weather-resistance is desired. Full-range frequency response makes these systems ideal for indoor and outdoor installation, in monaural and stereo foreground or background music systems, and for applications in boutiques/shops, restaurants/cafes, corporate AV applications and houses of worship. Multi-position, C-shaped mounting bracket and rugged construction provide optimum installation flexibility and assurance of long-term service.