1. Combines timer and dimmer functions into one device. 2. Features 8 preset time and brightness settings with timer switch and adjustable natural brightness levels. 3. Simulates sunrise and sunset to create a natural day and night cycle for aquarium fish. 4. Automatically turns aquarium lights on and off according to user-defined schedules. 5. Functions as a dimmer with brightness adjustable from 0% to 100%. Cautions: 1. Use only with the included power supply; input AC 100-240V; output DC 5V-30V. 2. This device is not waterproof. Wide voltage input range: DC 5V-30V Sunrise and sunset modes: 90-minute transition with 12/24-hour cycle options Maximum power capacity: 150W Material: Plastic Color: Black Package Contents: 1 x Light Dimmer Controller Note: The package includes only the items listed above; other accessories are not included. Note: Lighting effects and display differences may cause slight variations in color between the product image and actual item. Measurement may vary by +/- 1-3 cm.