... 200fps and guarantee image brightness Solid and durable: a series 3D glasses are durable yet flexible, replaceable battery increases life ... intelligent auto on/off to extend battery lifespan, the 3D glasses waken automatically when receiving IR signal, and go ... Contrast:1500:1 Battery Type: 3V battery Transmitter Compatibility:3D TV and 3D film (own IR emitter), no emitter is needed Synchronous ...