12V/24V RGB 4A Signal Amplifier Range Extender Waterproof IP67 RGB LED PWM control Signal Amplifier - Used to extend the range and synchronize multiple LED strip to a single LED Controller, i.e. EV-RGBCTRL-4A Receives PWM signals from the controller, and synchronizes and amplifies. Many EV-RGBAMP-WP4A may be connected to a single Controller Used to amplify any 12V or 24V LED PWM signal up to 4A per ch (3 channels) 12V DC (or 24V) driver required to power this amplifier, dependant on LED strip wattage