Specification :Type: USB LED strip gentle Voltage: DC 5V (USB Power Supply) LED Type: SMD 5050 Light Color: RGB Strip Length: 1m / 2m / 3m / 4m / 5m /10m/20m (The longest strip is 10 meters in a roll. while you are going to purchase the 20m set, we will send 2 rolls of 10m + a connector, you need to use it to connect the light strip. ) The product link entails four LED strip options: Bluetooth controller:Led Strip + Bluetooth controller 24key distant with Bluetooth controller:Led Strip + Bluetooth controller + Infrared RemoteUSBApplicationTV, computer, caravan, automobile decoration, holiday decoration