Control Your Lights from Anywhere. Install the smart WiFi LED bulbs as easily as a standard light bulbs. These bulbs connect to your home WiFi easily without a hub. The Sengled Home App allows you manage your lights, including colour and brightness adjustment as well as schedule setting, scene and energy monitoring anytime, anywhere. You can use simple conversation to control yours lights when paired with Amazon Alexa or Google Assistant. Features: No Hub Required: Connect the Smart WiFi LED bulb to your 2.4 GHz WiFi network with the Sengled Home app (iOS/Android) to get started Smart Lighting: Turn lights on and off, dim and brighten, and more with the app Voice Control: Connect the bulb directly to your Alexa or Google Assistant device and control your lights via voice commands Set the Mood: Choose from over 16 million colours or whites (soft white to cool white / 2000K to 6500K). Lights will automatically turn to the last setting used when turned back on. Create Scenes and Routines: Set scenes, change colours or put your lights on a schedule, whether at home or away Specifications: Dimensions: H:10.0 x W:12.0 x D:6.5 cm Guarantee:2 Years Model Number: W21-U33W2P