Ivy Bronx Smart LED Ceiling Light 24W 2400lm App or Voice Control RGB+CW Color Ambiance WiFi Bathroom Light IP54 Waterproof Bedroom Ceiling Lamp, No Hub Required (2.4Gz WiFi + Bluetooth) 1. RGBCW Multi-Color RGB+ Cool white + Warm white smart led ceiling light uses high light transmittance lampshade, professional light distribution choice. RGB uses a single 2835 package, a single 144pcs lamp beads make the RGB power and light output more excellent. 2. Dimmable Brightness With 16 million colours and the brightness of every colour is dimmable. The bedroom lights brightness can be fixed percentages from 1% - 100%. You can DIY any atmosphere for your own space, suitable for creating a variety of festive atmospheres. 3. App/Voice Control The smart bulbs that work with Alexa allows you to control your ceiling lights by the “Smart Life” App through WiFi + Bluetooth connection whenever and wherever you are. Compatible with Amazon Alexa and Google Home, allows you to control smart ceiling light with your simple voice commands, no hub required. Lamp irradiation area The irradiation area of white light and warm light is 10-20sq.m, other RGB lights are only auxiliary lighting and cannot be used as the main lighting.