Sony TDG-BR50/L Youth Size 3D Active Glasses, Blue Stylish, ergonomic 3D glasses in blue adjustable for high comfort--youth sized Seamless synchronization for a clear precise image; excellent color accuracy and high contrast Wide viewing angle for flexible sitting; fits even while wearing glasses Energy efficient design, including an auto-standby feature--up to 100 hours of battery life Requires compatible 3D Sony BRAVIA HDTV, 3D Sync Transmitter, and 3D source content