Product details:

Viewable from up to 7 feet inside your home. Image Dispersion System completely Blocks peeping from outside. Uses an SCR-Filter to get an image at night time in minimum light conditions Pressure Sealed Prism set prevents permeating of moisture and dust Adjustable for 1 1/8" to 2" thick doors, For use in fire rated doors up to 20 Minutes Label Made from ABS Plastic. Made in Korea - Provides 168 degree wide-angle view - Viewable from up to 7 feet inside your home - Quick, accurate and reliable identification of all visitors - Durable and maintenance free - Easy installation - Actual image supposed to be reversed - Made from ABS Plastic - Image Dispersion System completely Blocks peeping from outside - Uses an SCR-Filter to get an image at night time in minimum light conditions - Pressure Sealed Prism set prevents permeating of moisture and dust - Adjustable for 1 1/8" to 2" thick doors - For use in fire rated doors up to 20 Minutes Label