Revo Video Surveillance System RL81D2GB4GM21 for St Louis businesses. This complete video surveillance system from Revo is perfect for small to medium sized businesses or homes. The system includes 2 indoor dome cameras with 700 TV lines resolution and up to 100 feet of clear night vision, even in total darkness. The four bullet cameras also feature 700 TV lines resolution and 100 feet of night vision, and can be installed for indoor or outdoor use. Each camera has a built in microphone for audio monitoring. The system includes a 22" LED monitor and a DVR system with 1TB of hard drive storage.