SainSonic Branded SSZ-200BP 3D Rechargeable Infrared Active Shutter Glasses For Panasonic VT20,GT20, UT30, DT30, ST30 series 3D HDTVs *BLACK* Newest 3D Active Glasses offer even greater comfort over hours of viewing. Work with mainstream Panasonic 3D HDTVs. Active Sync Smart Technology- no programming or technical skills necessary to set these 3D glasses to your 3D TV. Easy to operate and Simple One Button Operation w/ Auto Shut Off Feature. The best alternative to other 3D glasses with its impressive function and incredible price!