Product Name: MEIRIYFA 12V to 24V 3-button mini led strip single color controller dimmer. Scope of Application: It is widely used to control the brightness and flash of indoor monochrome led light band. For example, point lights, soft bars, and so on. Product features: -Rated voltage: DC 12V to 24V. -Rated power: 12V<72W, 24V<144W. -Total length of wire: 23 cm/9.05 inches. -Black is connected to the negative pole, and red is connected to the positive pole. -Small size, easy to carry. How to use: You can use three keys to select different dynamic modes and brightness. Mode key: change to flashing mode, with 8 different flashing modes. In this mode, press the speed key to change the speed of light flashing. Speed key: press this key for more than 1 second, the controller will shut down, and the random key will resume operation. LIGHT key: Press this key to switch the light dynamically to the static mode. In this mode, press the speed key to change the light brightness. Package Includes: 5 * 12V to 24V three-button mini led strip single color controller dimmer.