GE Cync ST19 Smart LED Light Bulbs Color Changing Edison Style Light Bulbs Works with Alexa and Google Home Seymour Midwest • 24 hour on off timer Size:6 Pattern • 24 hour on off timer The carbon block has millions of active sites on its surface and within the structure which can absorb impurities like a sponge and can absorb and hold other types of impurities on its surface like a magnet Each LED globe bulb has a tunable white spectrum that supports your sleep wake cycle and creates the perfect scene for winding down or waking up Voice Control Smart Light: Take advantage of hands free control with home automation by connecting the Cync smart light bulb to Amazon Alexa or Google Home devices (sold separately)