Get the 3D theater experience at home with a 3D DLP projector and these 3D glasses from Monoprice!So far, Active Shutter 3D technology produces the best quality 3D images. However, it usually comes with a steep price when you factor in the cost of glasses for the whole family. Now you can enjoy the best quality 3D for the entire family with Monoprice DLP-Link 3D Glasses for 3D DLP projectors!These glasses are intended for use with 3D ready DLP projectors. They use IR (infrared) for communications and are powered by a single CR2032 battery cell (included), which will power the glasses for up to 70 hours of use!Each pair comes with a storage pouch and cleaning cloth, to help keep the glasses in optimum condition at all times. They weigh only 1.7 ounces and feature a 1000 1 contrast ratio.*** 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty. ***