CBU-PWM4-4-LR is a Bluetooth-controlled, Casambi-enabled four-channel PWM dimmer for 12–24 VDC constant voltage LED loads like strips or modules. It supports up to four channels for RGBW or tunable white applications, with a total output of 4 A. The device offers overvoltage, overcurrent, and short-circuit protection and can be operated via the Casambi App or wall switches. Casambi systems can scale up to 250 units in a smart mesh network.