TCP Smarts Wi-Fi Warm White Colour Changing and Dimmable (E27 Screw Cap) Classic Bulb creates the perfect lighting scene for any occasion in any room. Compatible with Amazon Alexa and Google Home Assistant. Simply download the TCP Smart App from the Apple store or Google play fit your bulb then add your bulb in the App. Download the TCP Smart skill to enjoy controlling your lighting with simple commands. No additional hub is required and the product connects securely throughout your existing Wi-Fi. Works on 2.4 Ghz Wi-Fi only - if you have a dual band router please set to 2.4 Ghz network to pair. Easy installation fit connect play.