Playbulb Rainbow colored Bluetooth Smart LED light provides general lighting and can replace most ordinary low wattage light bulbs. Its RGB color wheel palette makes color changeable. An exclusive free App is used to control the light on / off, adjust the light brightness, select RGB colors and control other additional functions. It is absolutely wireless, just need screw it into any E27 / E26 screw base and then turn it on / off like an ordinary light bulb. It uses Bluetooth 4.0 to achieve fluent transmission. The app can run on both recent Apple devices and Android devices.