One Way Mirror Window Film Privacy Sun Blocking Glass Sticker Heat Control Reflective Film Self-Adhesive Window Film Features: Privacy: The self-adhesive window film creates a transparent space that blocks the view from the outside, but you can still see from the inside and know what's happening outside. Note!: One-way perspective principle: It is difficult for the bright side to see the dark side. Currently, there is no one-way film on the market that cannot see indoors even when the lights are on at night. Since you can see outdoors indoors, it means the film is transparent. Transparent films can only achieve one-way perspective by using the difference in light intensity. UV Blocking: The glass film blocks most harmful UV rays to protect your skin from damage and reduce fading and aging of furniture. Heat Control: Keeps you cool in summer and warm in winter, providing you with a comfortable environment. Safety Protection: If your glass accidentally breaks, this window film can prevent the broken glass from splashing to protect you and your family. NO GLUE: The window film is glue-free, easy to install and remove without residue.