【What is the guarantee for your product?】Lifetime warranty and online service! If you have any questions about HUOPO product, you can contact us at any time! Give you a satisfactory solution within 8 hours! We provide replacment and refund service!. 【Are there 2 or 4 in the package?】 4PCS is in the package, very affordable! 2 semi-transparent car sunshade window shade, better shading! Installed on the side window and used together with the car baby safety seat, keep your baby away from harmful rays and harsh sunlight. Two transparent ones are used for the front side windows to help the driver to shade the sun without blocking the line of sight. 【This window sun shade will work for my car?】 21"x14" HUOPO Sunshade is suitable for most larger car side windows of SUVs, minivans and full size cars. If you are not sure whether it is suitable for your car, please measure the window size before buying Or contact us. 【Will The black window sunshade block the sight?】 No! HUOPO sunshade is composed of a transparent surface and a half mesh surface. The transparent surface provides electrostatic adhesion, easy installation and removal. The mesh net surface blocks the sun rays and heat, plays a protective role and maintains visibility, you can easily see the outside scenery from the inside of the car. 【How to protect your children on a summer car trip?】 The HUOPO window sun shade blocks up to 98% of UV's harmful light, blocking the sun's glare and heat. Side Window Car Shade can prevent the sun rays from irritating the skin of passengers and babies and keep the car relatively cool.