40M/131Ft LED Strip Lights APP Control Color Changing RGB Led Light Flexible Lamp Tape for Room Decoration TV Backlight DiodeNote: The remote control comes with a battery (CR2025).(The longest light strip is 20 meters per roll. If you purchase a set of 30 meters or 40 meters, we will send a set of 2 rolls of 15 meters or 2 rolls of 20 meters)Specification :Type: USB LED strip lightVoltage: DC 5V (USB Power Supply)LED Type: SMD 5050Light Color: RGBStrip Length: 1m / 2m / 3m / 4m / 5m /10m/15m/20m/30m/40mThe product link includes 5 LED strip options:3Key controller: Led Strip + 3 Key controller ( NO Remote, NO APP).IR 24 Key controller: Led Strip + 24 Key Infrared Remote controller. ( NO APP).Bluetooth 24 Key controller:Led Strip + Bluetooth controller + 24 Key Infrared Remote controller.(Can Use The Mobile App To Control The Light Strip)IR 44 Key controller: Led Strip + 44 Key Infrared Remote controller. ( NO APP).Bluetooth 44 Key controller:Led Strip + Bluetooth controller + 44 Key Infrared Remote controller.(Can Use The Mobile App To Control The Light Strip)Note: The remote control comes with a battery (CR2025).