Control Your Lights from Anywhere. Install the smart Sengled LED bulbs as easily as a standard light bulb. This bulb connects to the Sengled Bluetooth App which allows you manage your lights: Including brightness adjustment and schedule setting. You can use simple conversation to control your lights when paired with Amazon Alexa or Google assistant. Features: Light schedules: Schedule your lights to turn on or off automatically. Wake up and sleep mode functions included Smart Lighting: Turn lights on and off, dim and brighten and more with the Sengled Bluetooth App Voice Control: Connect the bulb directly to your Alexa or Google Assistant device and control your lights via voice commands Create Scenes and Routines: Set scenes, change colours or put your lights on a schedule, whether at home or away. Mesh network: Use multiple bulbs to form a mesh network for extended control range Specifications: Dimensions: H:10.0 x W:12.0 x D:6.5 cm Guarantee:2 Years Model Number: B11-U21W2P