Features: ★Can Cut Fiber: Flexible, Can Be Be Bent Into Any Shape, Cut At Any Length. Diy What You Want. ★Adjustable Brightness: APP Control Allows You To Change Mode And Adjust Brightness, Light Mode As You Like ★Sound Effect: The LED Car Bottom Light System Is Equipped With A Sound Sensor, So That The LED Light Can Be Synchronized With The Music Beat. Led Light Music Strip Follow The Beat And Adjust The Flashing To Suit The Intensity Of The Sound. Facilities: Facilities: Please Download The APP Via The Qr Code On The Main Control Box First, And Control The Light Mode Via Bluetooth Connection. This Product Includes 1 Main Control Box, 4 Sub-Control Boxes. Each Controller Has A Power Cord, The Main Controller Is Connected To A 5-12V Power Supply, And The Subcontroller Also Needs To Be Connected To A 5-12V Power Supply As A Grille Pole Power Supply. Each Controller Has 4 Connection Ports, Users Can DIY The Location Of Each Light By Themselves.