With recent advancements in home entertainment technology there have been massive improvements in the quality of TV viewing with development of effects that introduce the user to a new level of audio and imagery. Hama 3D shutter glasses heighten the 3D experience and allow simple, high-quality viewing by using active technology to automatically detect a 3D signal via the built-in infrared receiver. Once detected, this then triggers a voltage which passes through the lenses in order to darken them in sync with the refresh rate of the screen, hence altering perspective and creating the 3D effect. Designed especially for the use with the Samsung brand, Hama 3D shutter glasses are compatible with all 3D TVs across the Samsung range, as well as being compatible with all devices with an infrared synchronization signal. Simply slip them on for the ultimate 3D experience, designed to provide maximum comfort even when worn over everyday glasses for up to 70 hrs operating time. Furthermore, with in-built energy saving capabilities, the glasses will switch off automatically when no signal is detected in order to extend battery life and ensure that the entertainment goes on and on and on.