- Installs in less than a minute- Compatible with both 70V and 25V systems- High intelligibility and efficiency- Direct and reflected sound paths create wide dispersion angle- Lightweight and durable plastic shell with an off-white, paintable finish- Simple, three-step installation process- No tool(s) installation- Color-coded mounting studs identify polarity to make the electrical connection easier (no external wires)- High-quality, wire-wound volume control on outside of speaker for easy access- Can be installed in any drop ceiling with standard ceiling tiles- Surface-mounting design eliminates need to cut ceiling tile, no mess installation- Contemporary design blends/matches any decor- SM4T has switch-selectable multiple taps for controlling output level (taps – 4, 2, 1, 1/2, 1/4 watts)- O-ring seal holds speaker tight to ceiling surface, eliminating whistling and ensures smoother sound without peaks- Textured studs easily pierce ceiling tile and secure wire nut connections- Wide-bottom, easy-to-handle mounting wing nuts provide secure speaker mounting- Tile Bridge available (Model SMTB, sold separately)- All necessary mounting hardware included- Complies with NFPA National Code 160b and UL-2043 (Report available)