The Fusion Mirror is different to the HS-A70RVM 7-Inch Car Backing Rear-view Mirror LCD Monitor. The Fusion 403 has only a 4-inch LCD screen. This Mirror mount screen is a better choice for vehicles that wish to have the screen active whilst driving, as you will still be able to use the rest of the mirror as intended. Activates automatically when you select reverse gear or can be activated manually at any time.