Thank you for viewing. I purchased this item on Amazon in September 2025, but as I no longer have a use for it, I am offering it for sale in **【completely unopened, brand new condition】**. This is a high-performance electronic rearview mirror (rearview camera system) that dramatically improves the safe riding of bicycles. It ensures rear visibility and greatly contributes to accident prevention. 【Features of this product】 • High-definition 1080P Full HD video: Displays the rear view in real-time and clearly on a 4.3-inch monitor. • Overwhelming battery capacity: Built-in large 8000mAh battery allows for up to 10 hours of continuous use. Safe for long-distance cycling. • Excellent visibility: Automatic brightness adjustment function and removable sunshade plate maintain visibility in direct sunlight and at night. • High durability: IPX7 water resistance, able to withstand sudden rain. • Easy installation: No tools required, can be attached to a wide range of handlebars from Φ20 to 42mm. 【Product Contents】 • Brand: PARKVISION • Model Number: BK-436 • Condition: New, unopened (the outer box shrink wrap is still intact) • Accessories: Camera, monitor, bracket, charging cable, instruction manual, etc. 【Shipping】 I would like to sell this item quickly, so I will ship it within 24 hours of purchase. I will carefully package it and ship it anonymously. Please consider this for a safe cycling life.