| Business | Phone |
| Huffmaster Associates 1300 Combermere Dr, Troy 48083 | (248) 588-1600 |
| Sonic Alert Inc 1050 E Maple Rd, Troy 48083 | (248) 577-5400 |
| Detection Systems & Engrg 1450 Temple City Dr, Troy 48084 | (248) 649-1310 |
| Of Michigan First Security 3290 W Big Beaver Rd, Troy 48084 | (248) 458-6068 |
| National Home Security Inc 1475 W Big Beaver Rd, Troy 48084 | (248) 816-0430 |
| Micro Video Products 1270 Rankin Dr B, Troy 48083 | (248) 589-2640 |