Sengled Smart Light Bulbs Multicolor A19 integrate seamlessly with Alexa smart devices to offer beautiful lighting throughout your home. With Bluetooth Mesh technology, each color changing light bulb acts as a range extender, enabling simple whole-home installations. With BLE Mesh, you can now do a whole-home installation, no longer limited by Bluetooth's shorter range. The alexa light bulb conforms to Amazon's Simple Setup for a struggle-free, tinker-free, and stress-free setup experience. Track energy usage through Alexa Smart Energy and use voice or the free Alexa app to control on/off, dimming, and scheduling.