CBU-PWM4 is a Bluetooth-enabled dimmer for constant voltage LED loads. It has 4 channels for RGBW and tunable white applications, with a max output current of 6A. It's protected against overvoltage, overcurrent, and short circuits, but not reverse polarity. Use the Casambi app to control it. It can be used independently or with up to 250 units forming an intelligent mesh network.