What is the best wireless camera surveillance system out there?

I need help. I want to set up a wireless security camera in my business in the Philippines and view activity here in the United States. Can someone out there guide me on what I need? (e.g. cameras, software, computers, etc..) I want to set up at least 4-8 wireless camera throughout the building. I want something not too fancy and not to pricey.. Let me know?