1. Fortress Security Systems
137 E Colorado Blvd, Monrovia, CA 91016
Coordinate: 34.14611,-117.99918
Phone: (626) 359-4613
2. Monitor Security Systems
174 W Pomona Ave, Monrovia, CA 91016
Coordinate: 34.13362,-118.00196
Phone: (626) 286-0511
3. Security Systems
1009 S Canyon Blvd, Monrovia, CA 91016
Coordinate: 34.14113,-117.99682
Phone: (626) 263-9164