N11 Universal 3D Glasses (IR, RF & Bluetooth Compatible) by Quantum 3D (4 Pack) Active Shutter for both Bluetooth (RF) & Infrared (IR) 3D Glasses Liquid Crystal Active Shutters triggers 3D viewing in a full color spectrumenhances your 3D viewing experience with intense vivid colors (produces sharp clean colors that bests passive technology) Duo Sync Technology Universal 3D Glasses compatible with all major 3D TVs and 3D Projectors Sleek frame design and material make it a stylish and comfortable fit