1. Metro Alarm Systems 46777 7 Mile Rd, Northville, MI 48167 Coordinate: 42.42331,-83.50464 Phone: (734) 589-0666
2. Safetytec 143 Cadycentre Ste 317, Northville, MI 48167 Coordinate: 42.43024,-83.48255 Phone: (248) 345-0918