10-level dimming to meet the light requirements of plants and pets. Turning lights on and off gradually reduces impact on fish. Time switch combines timer and dimmer functions. Suitable for most fish tank lights with input and output of 12-24V. Adaptation Voltage: 12-24V Applicable Power Range: 3-100W Adaptation Type: Single-channel Lamps Product Connector: 5.5mm DC male with lock thread Functions: 1. Timing 2. Four Sunrise and Sunset Modes 3. Ten-level Brightness Adjustment Note: 1. This aquarium lamp timer is not suitable for saltwater aquariums. 2. Do not use with AC (alternating current) power sources. 3. Do not exceed the specified voltage and power range during use. 4. Input voltage: 12V - 24V 5. Output voltage: 12V - 24V 6. Power capacity: 50W - 100W Operation Tips: - To set the current time, press the R key and the on/off key simultaneously for 2 seconds, then use the +/- buttons to adjust. - Ensure voltage and power ratings are within the supported range. Safety Instructions: 1. The timer is not waterproof; keep away from water and damp areas. 2. The working voltage must match the timer's specifications. 3. Do not touch the timer with wet hands. 4. Turn off the power before performing any maintenance. 5. If the product is not functioning properly, have it repaired by a qualified professional. 6. If the product falls into water, immediately disconnect power and dry in a cool place. 7. Avoid prolonged exposure to direct sunlight. 8. This product is not a toy; keep out of reach of children. Color: Black Material: Plastic Package Contents: 1 x LED Light Dimmer Controller Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error allowed is +/- 1-3cm.