This is a convenient large monitor mirror that allows the driver to check on a baby in a rear-facing baby seat using the car's rearview mirror. It uses a lightweight, shatter-resistant resin mirror for safety. Easy installation with belts and plates. Includes angle adjustment spacers that can be moved with Velcro. Effective when used in conjunction with a commercially available wide mirror with a vertically expanded mirror surface. Package size: Height x Width x Thickness (mm) 330 x 210 x 130 Product dimensions: Height x Width x Thickness (mm) 360 x 220 x 130 Weight (single unit): 690g Although unused, the box is crushed due to home storage. Please understand this before purchasing.