Premium, HD Compatible 70/30 teleprompter glass designed to provide the perfect balance of reflectance and pass-through without any distortion These mirrors are high definition compatible, and have the highest optical quality on the market. One side is mirror coated, and the other side has an antireflective coating. This allows your camera to have excellent picture quality, while still providing you with the reflection you need to see the text. The coatings are durable, and you can clean them with standard glass cleaner.